sb 32-1620
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TRANSMITTAL SHEET
INSPECT INSTALLED BRAKE UNIT PART NUMBER AHA1653 FOR WIPER RING EXTRUSION ANDPISTON SWELLING
SERVICE BULLETIN SB -32-1620
This sheet transmits Rev. 4, dated Apr 23/14 to the Meggitt Aircraft Braking SystemsService Bulletin SB-32-1620 dated Feb 19/13.
Action
1. Remove and discard Service Bulletindated Feb 19/13.
2. Insert Service Bulletin at Rev. 4 suppliedherewith.
3. Amend Service Bulletin index, wherenecessary.
Remarks
1. Main wheel installed inspectionprocedure removed.
2. Part number AHA1653-10 added.
3. Editorial changes and result formupdated.
Signed:
G Percival
Chief Airworthiness EngineerDate: Apr 23/14
SEE EXPORT COMPLIANCE NOTICE ON CMM TITLE PAGE.
E M A I L : m o h
d s u p i a n @ b e r j a y a - a i r . c o m
C O : 6 9 6 0
B E R J A Y A A I R S D N B H D
7/26/2019 SB 32-1620
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E M A I L : m o h
d s u p i a n @ b e r j a y a - a i r . c o m
C O : 6 9 6 0
B E R J A Y A A I R S D N B H D
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SERVICE BULLETIN NUMBER -32-1620
INSPECT INSTALLED BRAKE UNIT PART NUMBER AHA1653 FOR WIPER RING EXTRUSION AND PISTON SWELLING
SB-32-1620Nov 01/12 Page 1Rev 4 Apr 23/14
COPYRIGHT © 2014 MEGGITT AIRCRAFT BRAKING SYSTEMS
1. Planning Information
A. Effect ivity
(1) Aircraft Affected
- ATR 72
(2) Part Number- AHA1653
- AHA1653-9
- AHA1653-10
B. Reason
(1) There is a possibility of piston wiper Ring extrusion on Brakes P/N AHA1653,
P/N AHA1653-9 and P/N AHA1653-10.
(2) There is also possibility of the Piston and/or pistons swelling on Brakes
P/N AHA1653, AHA1653-9 and P/N AHA1653-10.
C. Description
(1) This service bulletin gives a procedure with the main wheel removed to do a visual
inspection.
(a) Visually inspect piston for swelling.
(b) Do a dimensional check of the piston.
(c) Check the brake running clearance without hydraulic pressure applied.
D. Compliance
(1) Meggitt Aircraft Braking Systems recommends compliance with this service bulletin.
E. Approval
(1) The technical content of this service bulletin is approved under the authority of
Meggitt Aircraft Braking Systems.
(2) The technical content of this document is approved under the authority of DOA No.
EASA. 21J. 044.
SEE EXPORT COMPLIANCE NOTICE ON CMM TITLE PAGE.
E M A I L : m o h
d s u p i a n @ b e r j a y a - a i r . c o m
C O : 6 9 6 0
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SERVICE BULLETIN
SB-32-1620Nov 01/12 Page 2Rev 4 Apr 23/14
COPYRIGHT © 2014 MEGGITT AIRCRAFT BRAKING SYSTEMS
F. Manpower
(1) Main wheel removed 15 min. each brake.
G. Weight and Balance
(1) Not changed.
H. Electrical Load Data
(1) Not changed.
I. References
(1) CMM 32-42-93.
J. Software Accomplishment Summary
(1) None.
K. Publications Affected
(1) None.
2. Material Information
A. Material - Price and Avai labili ty
(1) None.
B. Tooling - Price and Availability
(1) N/A.
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E M A I L : m o h
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C O : 6 9 6 0
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Nov 01Rev 4
COPY
3. A
/12pr 23/14
IGHT © 20
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. Main wh
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(2) If
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E M A I L : m o h
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SERVICE BULLETIN
SB-32-1620Nov 01/12 Page 4Rev 4 Apr 23/14
COPYRIGHT © 2014 MEGGITT AIRCRAFT BRAKING SYSTEMS
(3) Measure the extension of all 5 Pistons (Ref Fig. 2.).
(a) If the extension is less than 15.00 mm (0.590 in) the measurement cannot be
taken. Just visually examine for piston swelling (Ref Fig. 3.).
(b) If the extension is 15.00 mm (0.590 in) or more use a lint free cloth to clean
the extended part of the piston.
(c) Measure the diameter of the piston at the widest part. If this dimension is
28.57 mm (1.125 in) or more, record this dimension and report the
measurement to MABS.
(d) If the dimension is 28.57 mm (1.125 in) or more remove the brake in
accordance with the applicable AMM procedure.
(e) Replace the swollen Piston(s) in accordance with CMM 32-42-93.
Piston Dimension CheckFig. 2
SEE EXPORT COMPLIANCE NOTICE ON CMM TITLE PAGE.
E M A I L : m o h
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C O : 6 9 6 0
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/12pr 23/14
IGHT © 20
(4) M
(
(
(
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14 MEGGIT
Exam
easure the
) Relea
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) If the
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) Inspec
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ple of Wip
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re the Brak
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E
BRAKING
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rance (Ref
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less than
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less than
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YSTEMS
usion and3
. Fig. 4.).
cordance
e as shown
,30 mm (0
the applic
,30 mm (0
e result ta
nce with C
L
iston Swel
ith the app
(Ref. Fig
.012 inch) r
ble AMM.
.012 inch),
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M 32-42-9
TI
ling
licable AM
.).
emove the
contact M
.
3.
SB-32-Pa
.
Brake
BS
620ge 5
SEE EXPORT COMPLIANCE NOTICE ON CMM TITLE PAGE.
E M A I L : m o h
d s u p i a n @ b e r j a y a - a i r . c o m
C O : 6 9 6 0
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SERVICE BULLETIN
SB-32-1620Nov 01/12 Page 6Rev 4 Apr 23/14
COPYRIGHT © 2014 MEGGITT AIRCRAFT BRAKING SYSTEMS
Brake Clearance CheckFig. 4
SEE EXPORT COMPLIANCE NOTICE ON CMM TITLE PAGE.
E M A I L : m o h
d s u p i a n @ b e r j a y a - a i r . c o m
C O : 6 9 6 0
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SERVICE BULLETIN
SB-32-1620Nov 01/12 Page 7Rev 4 Apr 23/14
COPYRIGHT © 2014 MEGGITT AIRCRAFT BRAKING SYSTEMS
B. Records
(1) Record in your maintenance records that this service bulletin has been satisfied.
4. More Data
If you have a question related to this service bulletin, please contact your Meggitt Aircraft Braking
Systems Local Area Manager.
5. Data Required by Meggitt Aircraft Braking Systems from the Operator or Owner of the A/C
Note: The Result form only needs to be completed if you find damage or extrusion of the wiper rings
or brake clearance is less than 0,30 mm (0.012 inch). Send the piston measurements
(diameter and extension) that are out of tolerance to [email protected].
Please complete the attached form and send to:
Ian WilldigCustomer Support Engineer
Meggitt Aircraft Braking SystemsHolbrook LaneCoventry, CV6 4AAUKTel: +44 (0) 2476668869Mob: +44 (0) [email protected]
SEE EXPORT COMPLIANCE NOTICE ON CMM TITLE PAGE.
E M A I L : m o h
d s u p i a n @ b e r j a y a - a i r . c o m
C O : 6 9 6 0
B E R J A Y A A I R S D N B H D
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COMPLETE THIS FORM IN BLOCK CAPITALS
OPERATOR
AIRCRAFT MFC SERIAL NUMBER BRAKE PART NO.
BRAKE POSITION BRAKE SERIAL NO.
yes/no
WIPER RING DAMAGE
WIPER RING DAMAGE
WIPER RING DAMAGE
WIPER RING DAMAGE
WIPER RING DAMAGE
Please add below the Address and contact details of the MRO to which the brake will be shipped for repair
LOCATION OF PISTON
PISTON DAMAGE
LOCATION OF WIPER RING
PISTON DAMAGE
LOCATION OF WIPER RING
LOCATION OF WIPER RING
LOCATION OF WIPER RINGLOCATION OF PISTON
PISTON DAMAGE
ATR72 WIPER RING AND PISTON DAMAGE RESULT FORM
NUMBER OF LANDINGS SINCE BRAKE WAS
INSTALLEDBRAKE CLEARNCE
Send the completed SB -32-1628 Result Form to Meggitt Aicraft Braking Systems
Attn: Ian Willdig, Customer Support Engineer, Meggitt Aircraft Braking Systems, Holbrook Lane, Coventry, CV6 4AA, UK
Tel: +44 (0) 2476668869, Mob: +44 (0) 7876501552
www.meggitt.com
LOCATION OF PISTON
LOCATION OF PISTON
PISTON DAMAGE
LOCATION OF PISTON
PISTON DAMAGE
LOCATION OF WIPER RING
E M A I L : m o h
d s u p i a n @ b e r j a y a - a i r . c o m
: 6 9 6 0
B E R J A Y A A I R S D N B H D