rotorcraft flight manual supplement - … · bhti 412, 412ep rotorcraft flight manual supplement...

RESTRICTED DISCLOSURE NOTICE ON PAGE 2

ROTORCRAFT FLIGHT MANUAL SUPPLEMENT

for

Bell Helicopter Textron Inc. Model 412, 412EP Helicopters Agusta S.P.A. Model AB412, AB412EP Helicopters

equipped with External Hoist Kit

Report Number AA–95034 Revision J

REGISTRATION No.:

SERIAL No.:

THIS MANUAL SHALL BE IN THE HELICOPTER DURING ALL ROTORCRAFT OPERATIONS

This supplement shall be attached to the applicable Flight Manual when the Aeronautical Accessories External Hoist Kit is installed in accordance with Bell Helicopter Textron Inc. STC SH3189SO. The information contained herein supplements the information of the basic Rotorcraft Flight Manual. For Limitations, Procedures, and Performance Data not contained in this supplement, consult the basic Rotorcraft Flight Manual and applicable Rotorcraft Flight Manual Supplements.

BHTI 412, 412EP ROTORCRAFT FLIGHT MANUAL SUPPLEMENT AA–95034 Agusta AB412, AB412EP EXTERNAL HOIST KIT Revision J

October 20, 2016 AERONAUTICAL ACCESSORIES of 31

RESTRICTED DISCLOSURE NOTICE

THE MANUFACTURER’S DATA PORTION OF THIS MANUAL IS PROPRIETARY AND CONFIDENTIAL. DISCLOSURE, REPRODUCTION, OR USE OF THESE DATA FOR ANY PURPOSE OTHER THAN HELICOPTER OPERATION IS FORBIDDEN WITHOUT PRIOR WRITTEN AUTHORIZATION FROM BELL HELICOPTER TEXTRON INCORPORATED (BHTI). THE MANUFACTURER’S DATA SECTION IS NOT REVIEWED BY THE FAA AND IS NOT FAA APPROVED.

CONTACT INFORMATION

Aeronautical Accessories 450 Industrial Park Rd. Piney Flats, TN 37686–4419, USA

Telephone: 423-538-5151 Toll Free: 800-251-7094

Fax: 423-538-8469

Email: [email protected] [email protected]

Website: www.aero-access.com

© (2016) BHTI UNPUBLISHED— ALL RIGHTS RESERVED

mailto:[email protected]

mailto:[email protected]

http://www.aero-access.com/


FAA APPROVED October 20, 2016 AERONAUTICAL ACCESSORIES of 31

REVISION LOG

REVISION DATE DESCRIPTION PAGE(S)

— 10/31/1995 No Revision All

Signed by: Paul Sconyers

A 4/23/1998 Added –XXX to P/N’s. 1,3

Added Reports for Flitestep.® 3

Signed by: Paul Sconyers

B 09/04/1998 Added Revision B. 2a

Added data addressing BHT ASB Hoist C.G. Envelope-penalty region. 4

Added page 4a. 4a

Moved Hoist Limitations to page 5. 4,5

Revise Generator Failure Section added “or on the pedestal.” 14

Signed by: Mel Taylor

C 07/12/1999 Added Agusta AB412 & AB412EP Effectivity. All

Added Revision C. 2b

Revised Skid Cable Guard P/N. 3

Signed by: Robert Goodall

D 12/06/1999 Added Revision D. 2c

Revised OPTIONAL EQUIPMENT and reference to fixed step. 3

Added reference to electric step. 3

Signed by: David Crew

E 05/23/2002 Added Revision E All

Added P/N 412-140-100/-200/-300/-400/-700/-750/-800/-850, information to “Introduction” section 2

Added 4 Axis Hover Control Assembly capabilities 3, All

Added P/N 412-300-100/-150/-200/-300 3,4

Added P/N 412-153-530 3,4

Reformat document All

Signed by: Kennedy Jones

F 08/18/2004 Reformatted Document All

Added Caution to Section 1: Limitations 3

Revised Hoist Loading Schedules 8-11

Signed by: Carl Mittag

G 11/28/2005 Revised Part Number references 1,4

Replaced references to Lucas with references to Goodrich 4,17

Revised Section 1: Limitations: Type of Operation 4



REVISION LOG


Revised Section 1: Limitations: Optional Equipment 5

Revised Section 1: Limitations: Required Equipment 5

Revised Section 1: Limitations: Weight/CG Limitations 5

Revised Section 1: Limitations: Added Hoist Penalty Region 6

Numbered Hoist Loading Charts Figures 2 thru 5 9-12

Deleted sections: Litter Hoisting, Empty Litter, Loaded Litter 17

Revised Section 2: Normal: After Exiting Helicopter: Revised reference to Operation and Maintenance Manual 17

Added Section 5: Weight and Balance 18

Signed by: Efrain E. Esparza

H 10/02/2006 Revised Section 2: Normal: Hoist Operation Check, Prestart Check 14

Signed by: Lance T. Gant

I 04/15/2016 Reformatted to current standards All

Added General Information section 8

1-1. Revised; added 290 ft cable information 9

1-3. Revised entire section 9

1-3-A. Added section 10

1-4. Revised wording 10

1-5. Revised Required Equipment (1-5-A); added section 1-5-B. 10

1-6. Revised entire section (including subsections 1-6-A. & 1-6-B.) 11

1-22. Added AVERAGE CABLE SPEED, HOIST DUTY CYCLE LIMITATION, & CABLE FLEET ANGLE information; revised cable fleet angle

12

Figure 1: Revised for clarity and title 13

Figure 2: Revised for clarity and title 14–17

2-3. Revised entire section (including subsection 2-3-B.) 18–19

2-4. Revised entire section (including subsections 2-4-A & 2-4-B) 19–22

2-6. Added section 22

2-7. Added: STEP switch (if installed) — STOW 22

2-9. Revised entire section (including LIGHT CARGO LOADS, 4-AXIS HOVER, & AFTER EXITING HELICOPTER)

23–26

3-7-A. Added EMERGENCY POWER CIRCUIT PROCEDURE; revised HOIST LOAD JETTISON

27

Manufacturer’s Data: Added section

Signed by : Thomas Brooks

29–30



REVISION LOG


J 10/20/2016 Added abbreviations for ºC and OAT 8 Deleted abbreviation for IFR and added IMC 8,9 Added Sections 1-11 and 1-20 12 Revised Figure 1 to Figure 1-7s 12,14,30 Added Figure 1-6 13 Revised Figure 2 to Figure 1-8 15-18

FAA APPROVED:

Manager DATE Delegation Systems Certification Office, ASW-130

Fort Worth, TX 76177



TABLE OF CONTENTS SECTION 1: LIMITATIONS ....................................................................................................................................................................... 9

1-1. INTRODUCTION ...................................................................................................................................................................... 9

1-3. TYPES OF OPERATION ......................................................................................................................................................... 9

1-3-A. PASSENGERS ...................................................................................................................................................................... 10

1-4. FLIGHT CREW ...................................................................................................................................................................... 10

1-5. CONFIGURATION ................................................................................................................................................................. 10

1-5-A. REQUIRED EQUIPMENT ...................................................................................................................................................... 10

1-5-B. OPTIONAL EQUIPMENT ...................................................................................................................................................... 10

1-6. WEIGHT AND CENTER OF GRAVITY .................................................................................................................................. 11

1-6-A. WEIGHT ................................................................................................................................................................................. 11

1-6-B. CENTER OF GRAVITY .......................................................................................................................................................... 11

1-7. AIRSPEED ............................................................................................................................................................................. 12

1-11. AMBIENT TEMPERATURES ................................................................................................................................................ 12

1-20. INSTRUMENT MARKINGS AND PLACARDS ...................................................................................................................... 12

1-22. HOIST PENALTY REGION ................................................................................................................................................... 12

SECTION 2: NORMAL PROCEDURES .................................................................................................................................................. 19

2-1. FLIGHT PLANNING ............................................................................................................................................................... 19

2-1-B. WEIGHT AND BALANCE ...................................................................................................................................................... 19

2-3. PREFLIGHT CHECK ............................................................................................................................................................. 19

2-3-B. EXTERIOR CHECK ............................................................................................................................................................... 19

2-4. INTERIOR AND PRESTART CHECK ................................................................................................................................... 20

2-4-A. HOIST INSTALLATION CHECK ........................................................................................................................................... 20

2-4-B. HOIST OPERATIONAL CHECK............................................................................................................................................ 21

2-6. SYSTEMS CHECK ................................................................................................................................................................ 23

2-7. BEFORE TAKEOFF .............................................................................................................................................................. 23

2-9. IN-FLIGHT OPERATION ....................................................................................................................................................... 24

SECTION 3: EMERGENCY AND MALFUNCTION PROCEDURES ....................................................................................................... 28

3-7. ELECTRICAL SYSTEM ......................................................................................................................................................... 28

3-7-A. DC POWER FAILURE ........................................................................................................................................................... 28

SECTION 4: PERFORMANCE ................................................................................................................................................................ 29



SECTION 5: WEIGHT AND BALANCE ................................................................................................................................................... 30

SECTION 6: SYSTEM DESCRIPTION .................................................................................................................................................... 30

FIGURES FIGURE 1-6. PLACARDS AND DECALS .............................................................................................................................................. 13

FIGURE 1-7. LONGITUDINAL / LATERAL CG ENVELOPE FOR HOIST OPERATIONS .................................................................... 14

FIGURE 1-8. HOIST LOADING SCHEDULE (1 OF 4) ........................................................................................................................... 15






GENERAL INFORMATION

ORGANIZATION The Rotorcraft Flight Manual is divided into 6 sections as follows:

SECTION 1 — LIMITATIONS SECTION 2 — NORMAL PROCEDURES SECTION 3 — EMERGENCY AND MALFUNCTION PROCEDURES SECTION 4 — PERFORMANCE SECTION 5 — WEIGHT AND BALANCE SECTION 6 — SYSTEM DESCRIPTION

Sections 1 through 4 contain data necessary to operate the helicopter in a safe and efficient manner.

Sections 5 and 6 contain Manufacturer’s Data, including Weight and Balance and the External Hoist Kit description.

ABBREVIATIONS

AFCS Automatic Flight Control System KIAS Knots Indicated Airspeed AGL Above Ground Level lbs. Pounds BHTI Bell Helicopter Textron Incorporated mm Millimeters

BL Butt Line OAT Outside Air Temperature ºC Celsius ODA Organization Designation Authorization

CG Center of Gravity PWR Power CLTV-YAW Collective Yaw R Right

DC Direct Current RAD ALT Radar Altimeter DN Down SAR Search and Rescue EN Engaged S/N Serial Number

ESS Essential STC Supplemental Type Certificate ICS Intercommunication System VDC Volts Direct Current

IFCS Integrated Flight Control System VEL HLD Velocity Hold IMC Instrument Meteorological Conditions VFR Visual Flight Rules

in. Inches VNE Never Exceed Speed kg. Kilograms



SECTION 1: LIMITATIONS

1-1. INTRODUCTION The Aeronautical Accessories External Hoist Kit 412-140-XXX enables operations in areas where landing cannot be accomplished.

The hoist can raise or lower loads up to 600 pounds (272 kilograms). An electrically actuated cable cutting device allows pilot to sever cable in an emergency. A manually operated cable cutter, accessible to the operator, may be used to sever the hoist cable if the electrical cable cutter should fail.

The 42325–12 Hoist System has a three-sixteenth inch hoist cable with a usable length of 250 feet (76.2 meters).

The 42325–14 Hoist System has a three-sixteenth inch hoist cable with a usable length of 290 feet (88.39 meters).

The 4-Axis Hover Kit (412-145-400) is an option available for the BHTI 412EP helicopter with the Search and Rescue (SAR) Interface Kit installed. With the 4-Axis Hover Kit, the Integrated Flight Control System (IFCS) interfaces with the External Hoist Pendant Controller to provide Hover Trim. This gives the hoist operator limited control of the helicopter during hoist operations.

1-3. TYPES OF OPERATION Hoist operations are approved for hoist loads up to 600 pounds (272 kilograms). See Hoist Loading Schedules.

CAUTION Hoist shall not be operated when other components are loading the roof tiedown studs adjacent to hoist support assembly.

Hoist operations must be conducted under appropriate operating rules for external loads.

The external load equipment certification approval does not constitute operational approval; operational approval for external load operations must be granted by the local aviation authority.

Hoist use approved for VFR only.

Hoist operations are prohibited during instrument meteorological conditions (IMC).

Hoist operations are approved only in hovering flight. The object being hoisted must be completely in the cabin before forward flight is established.



1-3-A. PASSENGERS Passenger operations with hoist installed are approved if hoist system is deactivated and hoist cable stowed.

1-4. FLIGHT CREW Hoist operator must wear an approved safety harness and protective gloves during all phases of hoist operations. Hoist operator must be familiar with hoist operating procedures and limitations.

1-5. CONFIGURATION

1-5-A. REQUIRED EQUIPMENT Hoist cable anti–chafing guard must be installed as follows:

1. On aircraft without skid mounted emergency flotation gear, install Skid Guard, Part Number 412–153–530 or 412–153–540 or 412–153–550.

2. On aircraft with skid mounted emergency flotation gear, install Skid Guard, Part Number 412–153–510 or 412–153–518.

1-5-B. OPTIONAL EQUIPMENT No passenger step may be installed on the right hand side of the aircraft concurrently with the external hoist except:

• Aeronautical Accessories Right Hand FLITESTEP® / FLOATSTEP™ Assembly Part Number 412–300–XXX installed per Report numbers AA-93086, AA-97087 or AA-97124

• Step that does not exceed R.B.L. 53.00 for low skid gear

• Step that does not exceed R.B.L. 58.00 for high skid gear.

Retractable (electric) passenger step (right side) must be stowed during hoist operations.

Refer to appropriate Rotorcraft Flight Manual Supplement(s) for additional limitations, procedures, and performance data.



1-6. WEIGHT AND CENTER OF GRAVITY

1-6-A. WEIGHT Actual weight change must be determined after hoist is installed and ballast readjusted, if necessary, to return empty weight CG within allowable limits.

Serial Number(s) Maximum gross weight (including hoist load)

33001 — 33107 11,600 pounds (5263 kilograms)

33108 — Subsequent 11,900 pounds (5398 kilograms)

Maximum hoist load is 600 pounds (272 kilograms). This is a structural limitation only and does not ensure that longitudinal or lateral CG will remain within approved limits. Maximum allowable hoist load varies with gross weight, center of gravity, and hoist location. Refer to appropriate Hoist Loading Schedule.

1-6-B. CENTER OF GRAVITY Butt line of load on aircraft equipped with low skid gear is 61.33 inches (1558 millimeters) from centerline.

Butt line of load on aircraft equipped with high skid gear is 65.33 inches (1659 millimeters) from centerline.

Fuselage station of hoist cable centerline is 130.1 inches (3305 millimeters) aft of datum.

Select Hoist Loading Schedule appropriate for position in which hoist is installed. Enter schedule at helicopter gross weight prior to hoisting. Proceed vertically to intersect appropriate diagonal line representing number of crew members on board. Then proceed horizontally to the left to read allowable hoist load.

The loading schedules labeled “With Hoist Ballast” represent allowable Hoist loads when 167 pounds (76 kilograms) of ballast is located at BL 40.0 left (1016 millimeters) to compensate for the moment of the Hoist kit installation.

NOTE The Hoist Loading Schedules are based on the most adverse loading combinations of pilot, copilot, and hoist operator, each weighing 170 to 200 pounds (77.1 to 90.7 kilograms) and on a weight empty CG 0.5 inches to the right of centerline (+0.5) prior to adding hoist. If lateral CG is appreciably different or if crew member weights are out of this range, allowable hoist load shall be computed. For computation, assume hoist operator is located laterally at BL 40.0 (1016 millimeters).



1-7. AIRSPEED

VNE with hinged panels locked open and cargo doors open is 20 KIAS.

VNE with hinged panels removed and cargo doors removed or secured open is 60 KIAS.

Hoist operations are approved only in hovering flight. The object being hoisted must be completely in the cabin before forward flight is established.

1-11. AMBIENT TEMPERATURES

OAT above 0°C: Maximum hoist load 600 lb [272 kg]

OAT between -20°C and 0°C: Maximum hoist load 550 lb [249 kg]

OAT at or below -20°C: Maximum hoist load 500 lb [227 kg]

1-20. INSTRUMENT MARKINGS AND PLACARDS

Refer to Figure 1-6 for placards and decals.

1-22. HOIST PENALTY REGION

Pilot shall know CG at time of hoist operation to determine if CG is within penalty region of Figure 1-7.

Each hoist operation performed is defined as reeling the hoist cable out and then in while hovering with any weight attached.

WARNING

OPERATION IN PENALTY REGION AFFECTS AIRWORTHINESS LIMITATIONS OF ROTOR COMPONENTS. REFER TO THE APPLICABLE MAINTENANCE MANUAL.

AVERAGE CABLE SPEED Raising: 150 feet per minute (46 meters per minute) with 600 pound (272 kilogram) load

250 feet per minute (76 meters per minute) with 300 pound (136 kilogram) load

Lowering: 250 feet per minute (76 meters per minute) with 600 pound (272 kilogram) load

HOIST DUTY CYCLE LIMITATION The hoist is approved for continuous operation with loads not exceeding 600 pounds (272 kilograms).

CABLE FLEET ANGLE Do not exceed 15 degrees from vertical [cable fleet angle (30 degree cone)].



LOCATION: HOIST OPERATOR’S AREA

Figure 1-6. Placards and Decals



Figure 1-7. Longitudinal / Lateral CG Envelope for Hoist Operations



Figure 1-8. Hoist Loading Schedule (1 of 4)



SECTION 2: NORMAL PROCEDURES

2-1. FLIGHT PLANNING

2-1-B. WEIGHT AND BALANCE

WARNING HOIST LOAD CAN CAUSE LONGITUDINAL OR LATERAL CG TO EXCEED LIMITS. GROSS WEIGHT AND CENTER OF GRAVITY MUST BE COMPUTED TO ASSURE LOADING WITHIN APPROVED LIMITS.

NOTE If additional loads are carried during hoisting operations, loads should be placed on the left side of helicopter, opposite the external hoist.

Gross weight and CG — Compute with and without hoist load.

2-3. PREFLIGHT CHECK

2-3-B. EXTERIOR CHECK

HOIST INSTALLATION CHECK

Hoist — Installed properly per installation instructions report AA-95029. Check condition and security.

Hoist Structure — Support and cover free of cracks and defects. No hardware slippage marks.

Hook Assembly — Rotates freely on cable.

WARNING HOOK ASSEMBLY BEARING MUST ROTATE 360 DEGREES FREELY WITH A MINIMUM POSITIVE LOAD APPLIED. BINDING OF THE BEARING MAY CAUSE DAMAGE TO THE CABLE ASSEMBLY WHICH COULD RESULT IN A BROKEN CABLE CAUSING INJURY TO PERSONNEL.

Bumper — Ensure bumper is not stuck in cable guide. Allows hook to reel in and out freely.



Cable Cutter Assembly — connector; check for security and condition. Without removing covers or panels, check harness assembly for condition; integrity of molding on harness to connector.

Cable — Check proper routing through guides, drums, and fairing.

Ball end of Cable — Good condition.

Cable Foul Sensor — Check fasteners for security and condition. Springs are not broken or damaged.

Cable Foul Actuator — Good condition.

Gearbox — Check for oil leaks (if leaks are observed, maintenance is required).

NOTE To properly check the oil level of the hoist while installed on the helicopter, the helicopter must be on a level surface and the hoist sight glass must be perpendicular to this surface.

HOIST EMERGENCY BUS circuit breaker — IN.

Electrical power cables — Condition; connectors secured.

Cover, plugs, and guards — Check for attachment security and tie wire installation.

2-4. INTERIOR AND PRESTART CHECK

2-4-A. HOIST INSTALLATION CHECK

CAUTION Actuation of CABLE CUT switch on pedestal can cut cable, regardless of HOIST PWR switch position.

CABLE CUT switch guard (pedestal) — Down; Lock-wire in place.

Safety vests, tether straps, hoisting slings and litters — Condition and secured or stowed.

Manual cable cutter— Condition and stowed.



2-4-B. HOIST OPERATIONAL CHECK

WARNING EXERCISE EXTREME CARE WHEN WORKING WITH ENERGIZED EQUIPMENT.

NOTE

Perform hoist operation check if hoist operations are anticipated.

NOTE This operational check requires a pilot and qualified hoist operator.

Cargo doors — Secured open or removed.

HOIST POWER, HOIST EMERGENCY POWER, and HOIST CABLE CUT circuit breakers — IN.

BATTERY switch — ON (or connect external power).

NON ESS BUS switch — MANUAL.

ICS — Check intercom between pilot and hoist operator using hoist pendant ICS trigger and HOT MIC switch (right ICS box only).

HOIST POWER switch — ON

HOIST controls (pilot and operator) — Actuate to check all hoist functions for proper operation. Check that pilot HOIST switch overrides operator pendant HOIST switch.

WARNING TO AVOID INJURY TO PERSONNEL FROM BROKEN WIRE STRANDS, LEATHER GLOVES (MIL-G-2366) MUST BE WORN AT ALL TIMES WHEN HANDLING HOIST CABLE. EYE PROTECTION MUST BE WORN BY THE OPERATOR WHENEVER OPERATING THE HOIST TO PREVENT INJURY FROM LUBRICANTS, SOLVENTS, AND OTHER MATERIALS USED ON THE HOIST, AS WELL AS METAL PARTS AND DEBRIS.

CAUTION When reeling out, do not impede the cable in any way (either with your hands, or other obstruction) as this may impede tension roller operation, and cause the cable to foul.

CAUTION During operation of the hoist, do not touch the motor. The motor temperature may be very hot, and may result in severe burns if touched.



Reeling out cable — Reel out cable from full-in position at 1/2 speed. Check cable for corrosions, kinks, flat spots, fraying, or broken strands.

CAUTION To avoid damage, during cable reel-out be prepared to release the thumbwheel and stop the hoist immediately if the cable drum does not stop with a minimum of three wraps of cable on the drum.

Intermediate slow-out switch check— Reel out cable at 1/2 speed until the hoist slows automatically. Check that cable is the proper distance from the full-out position.

Full-out switch check — Reel out cable at 1/2 speed until the hoist stops automatically. Check that cable is the proper distance from the full-out position.

CAUTION Do not allow the cable to reel in to the full in position without holding onto, and guiding the hook to this position. Allowing the hook to swing freely while reeling in to the full in position may cause damage to the hook, cable, hoist, and helicopter.

CAUTION Do not leave the hook loose under the hoist after the hoist has been used. Always ensure the hook has been homed securely, and the bumper spring is compressed sufficiently to prevent the hook from moving while the helicopter is in flight. A loose hook may result in a damaged cable.

Reeling in cable — Check that the cable wraps evenly on the drum with no gaps between adjacent turns of cable.

NOTE Always keep one hand on the cable while reeling in. If a problem occurs with the hoist, it can be felt in the cable.

Intermediate slow-in switch check — Reel in cable from full-out position at 1/2 speed until the hoist slows automatically. Check that cable is the proper distance from the full-in position.

Full-in switch check— Reel in cable at 1/2 speed until the hoist stops automatically. Check that cable is the proper distance from the full-in position.

HOIST PWR switch — OFF.

Crew member — Ensure hook and bumper assembly firmly seated against cable guide.

NON ESS BUS switch — NORMAL.



BATTERY switch — OFF.

CAUTION Do not touch cable until it has been grounded. Ground crew member should be instructed to discharge helicopter static electricity before attaching load to hoist when possible.

2-6. SYSTEMS CHECK

CABLE CUT switch (pedestal) — OFF; guard in place.

HOIST POWER, HOIST EMERGENCY POWER, and HOIST CABLE CUT circuit breakers — IN.

2-7. BEFORE TAKEOFF

Safety vests and straps — On and secured to helicopter.

Gloves — On.

STEP switch (if installed) — STOW.



2-9. IN-FLIGHT OPERATION

Maximum hoist load shall be determined prior to each hoist operation.

WARNING HOIST SHALL NOT BE OPERATED WHEN OTHER COMPONENTS ARE LOADING THE ROOF TIEDOWN STUDS ADJACENT TO HOIST SUPPORT ASSEMBLY.

WARNING DURING IN-FLIGHT OPERATION, A STATIC ELECTRICAL CHARGE DEVELOPS IN THE HELICOPTER. TO AVOID INJURY TO PERSONNEL, ENSURE THE STATIC ELECTRICAL CHARGE IS DISCHARGED TO GROUND BEFORE GROUND PERSONNEL ARE ALLOWED TO TOUCH THE HOIST CABLE OR HOOK ASSEMBLY.

WARNING DAMAGE TO THE CABLE ASSEMBLY OR SUBSEQUENT INJURY TO PERSONNEL MAY OCCUR IF CABLE MAKES CONTACT WITH AIRCRAFT FUSELAGE OR OTHER OBJECTS. DO NOT ALLOW CABLE ASSEMBLY TO RUB AGAINST ANY OBJECT DURING OPERATION.

WARNING HOIST OPERATOR SHALL BE SECURED TO HELICOPTER WITH AN APPROVED SAFETY HARNESS DURING HOIST OPERATIONS.

CAUTION Do not extend the Hoist Cable beyond the length that enables the cable hook assembly to contact the ground unless provision is made to prevent damage to, or entanglement of the cable.

HOIST POWER switch — ON.

Establish hover over hoist operation area.

Cargo doors — Open and latched during hoisting operations.

HOIST switch — DOWN.

Static Electricity — Discharge, when possible. Connect load to hook; observe allowable hoist load.



CAUTION Operate hoist normally at FAST speed to avoid excessive motor and gearbox heating. Use SLOW speed as load approaches ground. Hoist operator should control hoist load to prevent cable, hook, and load from fouling on fuselage or landing gear.

WARNING DO NOT TRY TO CLEAR A FOULED CABLE IN FLIGHT. A FOULED CABLE MAY BREAK, AND THIS MAY RESULT IN INJURY OR DEATH.

HOIST switch — UP.

Ground speed — Maintain zero ground speed until load is completely inside cabin.

At completion of hoisting operation: HOIST POWER switch — OFF.

LIGHT CARGO LOADS

WARNING HOIST LOADS MUST NOT OSCILLATE BEYOND LIMITS. IF NOT ARRESTED, INSTABILITY MAY BECOME UNMANAGEABLE. REELING IN AN UNSTABLE LOAD WILL AGGRAVATE OSCILLATION.

4-AXIS HOVER (HOVER TRIM CONTROL) For additional information on 4-Axis Hover (Hover Trim Control), refer to Bell Helicopter’s Rotorcraft Flight Manual Supplement: Dual Digital Automatic Flight Control System, Search and Rescue (SAR) with PT6T-3BE and PT6T-3D Engines (BHT-412-FMS-39.3 & -39.4) and Honeywell’s Integrated Flight Control System Pilot’s Manual (A28-1146-085).

In order to use the Hover Trim function, the VEL HLD mode must be engaged. Once engaged, both the longitudinal and lateral Doppler velocity references are held automatically by the pitch and roll axes of the Digital Automatic Flight Control System.

Pressing the VEL HLD button on the PC-700 Autopilot Controller actuates the VEL HLD mode. The pilot has control with the four-way cyclic beep switch with the plunger type button action. Pressing the center button once will return the velocity reference to zero.

Once in the VEL HLD mode, pressing the HOIST EN switch on the instrument panel enables the Hover Trim.



When the EN is lit, the hoist enable function is activated. The hoist operator may use the HOVER TRIM velocity beep switch to adjust the aircraft’s lateral and/or longitudinal velocity (to a maximum of 5 knots over any pilot selected reference) to assist in guidance of the hoist cable.

CAUTION When in VEL HLD Mode, selection of any flight director modes (pilot or co-pilot) will disengage VEL HLD.

NOTE The Hover Trim function receives 28 VDC power from the AFCS and does not require the HOIST POWER switch to be ON for the pilot’s HOIST EN switch to be operational.

Select RAD ALT and VEL HLD modes on autopilot controller.

CLTV-YAW TRIM UP and DN switch — As desired. Select RAD ALT altitude as desired on AL-300.

NOTE Below 100 feet AGL, pilot is required to have both hands lightly on controls to respond to engine failure or autopilot malfunction.

Cyclic beeper switch — Select VEL HLD direction and velocity.

NOTE Press center of beeper switch to return hover reference to zero. If cyclic FORCE TRIM release switch is pressed, a new hover velocity reference will be established at the time of FORCE TRIM switch release.

Pilot HOIST EN switch — Press to enable limited hover control by hoist operator.

NOTE Hoist operator has limited hover control by operating hover trim switch on hoist pendant in desired direction. Pilot may take hover trim control away from hoist operator by pressing HOIST EN switch, or simply by overriding hoist operator's inputs using cyclic stick or cyclic beep switch. The Pilot always has override capability.



NOTE Helicopter can be flown up to 5 knots around the reference hover velocity established by the pilot. Pendant switch is held in a given direction until desired speed is reached, then released to capture that velocity. To return to pilot selected velocity, switch is operated in opposite direction until added velocity is zero, then released.

AFTER EXITING HELICOPTER After last flight of the day, hoist maintenance action is required if the hoist has been used.

Refer to the applicable Goodrich Corporation document:

Hoist System 42325–12 Component Maintenance Manual, Document No. 25-00-01

Hoist System 42325–14 Component Maintenance Manual, Document No. 25-00-18



SECTION 3: EMERGENCY AND MALFUNCTION PROCEDURES

3-7. ELECTRICAL SYSTEM

3-7-A. DC POWER FAILURE

GENERATOR FAILURE In the event of a generator failure, actuate the Hoist Emergency Power Switch, located on the instrument panel or on the pedestal, to the EMERGENCY (Battery) position.

The hoist may be operated for 1 full cycle (hook down, hook up) while the hoist is on battery power. After this full cycle, actuate the HOIST POWER Switch, located on the pedestal, to the OFF position and the HOIST EMERGENCY POWER Switch to the NORMAL position to remove power from the hoist system and conserve battery power.

The pilot retains the ability to cut the hoist cable during a generator failure as power is supplied to the cable cut circuit by the EMERGENCY BUS.

If electrical cable cutter should fail, use manual cable cutter to sever hoist cable.

EMERGENCY POWER CIRCUIT PROCEDURE Battery switch — ON.

HOIST EMERGENCY POWER circuit breaker — IN.

HOIST EMERGENCY BUS Switch — EMERGENCY

HOIST POWER Switch — ON.

Complete hoist operation.

Battery switch — OFF.

HOIST EMERGENCY BUS Switch — NORMAL.

HOIST POWER Switch — OFF.

HOIST LOAD JETTISON To jettison hoist load in an emergency, actuate CABLE CUT switch (located on pedestal).

If CABLE CUT switch should fail:

Use manual cable cutter located on aft bulkhead panel bracket to sever cable.



SECTION 4: PERFORMANCE

No change from Basic Flight Manual.



MANUFACTURER’S DATA

SECTION 5: WEIGHT AND BALANCE

For Longitudinal/Lateral CG envelope for hoist operations refer to Figure 1-7.

Kit complete, installed (including Electrical Provisions):

Hoist System: 42325-12 (250 foot cable) 42325–14 (290 foot cable) Total weight: 185.3 lbs. (84.05 kg) 187.5 lbs. (85.05 kg)

Fuselage Station: FS 130.1 in. (3305 mm) FS 130.1 in. (3305 mm) Hoist Inboard: BL 48.2 R (1224 mm) BL 48.2 R (1224 mm)

Hoist Outboard: BL 51 .0 R (1295 mm) BL 51 .0 R (1295 mm)

SECTION 6: SYSTEM DESCRIPTION

The Aeronautical Accessories External Hoist Kit, 412-140-XXX enables operations in areas where landing cannot be accomplished.

The hoist can raise or lower loads up to 600 pounds (272 kilograms). An electrically actuated cable cutting device allows pilot to sever cable in an emergency. A manually operated cable cutter, accessible to the operator, may be used to sever the hoist cable if the electrical cable cutter should fail.

The 42325–12 Hoist System has a three sixteenth inch hoist cable with a usable length of 250 feet (76.2 meters).

The 42325–14 Hoist System has a three sixteenth inch hoist cable with a usable length of 290 feet (88.39 meters).

The External Hoist systems consist of three major components:

• Externally mounted Hoist Assembly

• Control Box

• Hand held Control Pendant Assembly.



Safety features for the External Hoist Kit are:

• Hoist is electrically bonded to the aircraft and structurally enclosed to guard all moving parts.

• Safety Hook featuring a spring loaded latch mechanism with a positive locking feature to prevent D Ring rollover and accidental disengagement from the hook.

• A cable cutting system enables the pilot to cut the hoist cable in the event of an emergency which requires the hoist load to be jettisoned.

• A level wind mechanism ensures an even lay of cable on the cable drum and ensures that the cable, at the point of exit from the external mounted hoist assembly, is always perpendicular to the cable drum.

• An installed slip clutch (load limit device) enables the cable to reel out automatically if the cable load exceeds 1275 to 1530 lb. The slip clutch prevents damage to the aircraft in the event of cable over load or accidental entanglement of the hook during hoist operation.

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