fmgs new standards

7/29/2019 FMGS New Standards

1/34

FMGC - New standards forA319/A320/A321

A319/A320/A321 Operational Liaison Meeting


2/34

2FMGS new standards for A319/A320/A321

Contents

Introduction Improvement brought by A1+/B1+ standards

Improvement brought by A3/B3 standards:

Page modification

REQD DIST TO LAND, DIR DIST TO DEST

Energy circle

Global speed protection

Miscellaneous FCU option

Conclusion


3/34


Introduction

2 different lines of FMGS are currently installedon the A319/A320/A321.

The FMGS B546 family (B1,B1+,B3) embodied on

all A321/A319 and A320 above MSN 530.

The older FMGS B398 family (A1,A1+,A3)embodied on all A320 below MSN 530.

The B546 family has received additional

capabilities such as Global Speed Protection,400 KWD database, full ACARS/printer

function.


4/34


5/34


Introduction All current standards of FMGS will be replaced

by A3 or B3 version.

This retrofit is free of charge and supervised by

Airbus Industrie.

It has commenced in October 98 and will lastapproximately 18 months.


6/34


FMGS standard A1+/B1+ All improvements of the A1/B1 and A1+/B1+

standards are included in the A3/B3 currently

retrofitted.

Therefore all airlines will receive both A1+/B1+

improvements as well as A3 or B3improvements.


7/347FMGS new standards for A319/A320/A321

FMGS standard A1+/B1+ The standard A1+/B1+ brings the following

improvements:

OEB 129 cancellation (Thrust reduction at cruise

flight level).

Reduce false LOC capture (LOC capture thresholdadjusted).

A/THR response improved in approach. (A321 logic

installed on A320).

Possible engagement of LOC and G/S above radioaltimeter validity.

VAPP reduction (option).



FMGS standard A1+/B1+VAPP reduc tion

It is a new algorithm that reduces the approach speed.

The formulae is:

VAPP = VLS + 1/3 of the headwind component

It is basic on A319, A321.

It can be retrofitted to all A320s through an optional pin

program.



FMGS standard A3/B3 Both standards B398 A3 and B546 B3 brings the

following improvements:

GPS Primary capable. (Remains an option)

Modification of the PROG page

modification of the EPE calculation

Energy circle

Deletion of OEB 132 and 134 (and 127 for A321 only).

For B546 B3 standard only:

ACARS/PRINTER capability

Global speed protection.



ECON APP AI320CRZ OPT REC MAX

_ _ _ _ _ _ _ _ _ _FL390

BRG / DIST

19 / 191 TO LFYSO8UPDATE AT

[ ]*

VDEV = + 30 FT

VOR1 / FREQ HIGH FREQ / VOR2TOU / 117.7 115.8 / GAI

FMGS standard A3/B3

Previous FMGC standard Standard A3 or B3


FL390

BRG / DIST

019 / 191 TO LFYS08

UPDATE AT

[ ]*

REQUIRED ACCUR ESTIMATED0.36 NM HIGH 0.30 NM

_ _ _ _ _ _ _ _ _ _

VDEV = + 30 FT

VOR 1 and VOR 2 are not displayed and cannot be tuned

on this page with this standard.

MCDU PROG page



FMGS standard A3/B3

Page layout modified

to allow the display of

GPS PRIMARY indication

when GPS is installed.


FL390

BRG / DIST

019 / 191 TO LFYS08

UPDATE AT

[ ]*

REQUIRED ACCUR ESTIMATED

0.36 NM HIGH 0.15 NM

_ _ _ _ _ _ _ _ _ _

VDEV = + 30 FT

PREDICTIVE

< GPS GPS PRIMARY

GPS PRIMARY installed

MCDU PROG page



REQUIRED NAVIGATIONACCURACY

The defaulted value

implemented in theFMGC depends on the

area of operation:

En route 3.41 NM

Terminal 2.07 NM

Approach 0.36 NM (VOR/DME 0.61 NM)

The pilot can modify the REQUIRED navigation accuracy

to enter an RNP route.

ECON APP AI320CRZ OPT REC MAXFL390

BRG / DIST

019 / 191 TO LFYS08

UPDATE AT

[ ]*



_ _ _ _ _ _ _ _ _ _

VDEV = + 30 FT

SYSTEM RNP IS 0.36 NM

FMGS standard A3/B3MCDU PROG page




BRG / DIST

019 / 191 TO LFYS08

UPDATE AT

[ ]*



_ _ _ _ _ _ _ _ _ _

VDEV = + 30 FT

PREDICTIVE

< GPS GPS PRIMARY


BRG / DIST

019 / 191 TO LFYS08

UPDATE AT

[ ]*



_ _ _ _ _ _ _ _ _ _

VDEV = + 30 FT

PREDICTIVE

< GPS GPS PRIMARY

ESTIMATED POSITIONERROR (EPE)

It is computed by the

FMGC and depends uponthe navigation mode used

to update the position.

GPS primary : close to 100 meters

DME/DME : tends towards 0.28 NM

VOR/DME : 0.1NM + 0.05 x distance to DME

Pure IRS : 8 NM/h for the first 21 minutes

2 NM/h after.




ECON APP AI320CRZ OPT REC MAX_ _ _ _ _ _ _ _ _ _

FL390

BRG / DIST

19 / 191 TO LFYSO8UPDATE AT

[ ]*VOR1 / FREQ HIGH FREQ / VOR2

TOU / 117.7 115.8 / GAI

REQD DIST TO LAND = 12NM

DIR DIST TO DEST = 20NM

Old FMGC FMGC A3/B3GPS not embedded


FL390

BRG / DIST

119 / 191 TO LFYS08

UPDATE AT

[ ]*

REQUIRED ACCUR ESTIMATED0.36 NM HIGH 0.30 NM

_ _ _ _ _ _ _ _ _ _

REQ DIST TO LAND = 12NMDIR DIST TO DEST = 20NM


REQ DIST TO LANDDIR DIST TO DEST

only displayed on the PROG page when the GPS is

not installed and HDG or TRK mode selected during

descent phase active.



FMGS standard A3/B3Energy circle

Required distance to land and direct distance to

destination are not displayed when the GPS

PRIMARY is installed.

The energy circle replaces this information.

It represents the required distance to land

displayed as a green arc on the NDs.

The energy circle requires the FMGS A3/B3 and theDMC V32 (Display Management Computer) to be

installed. Modification 26018, SB 31-1107.



FMGS standard A3/B3 The energy circle is displayed, when descent phase is

active and HDG (or TRACK mode) selected.

5.0R

7.5 7.5

5 5

GS 176 TAS 197 VOR

CD33L

INTCPT 3000

132KT

APP

239/20 6.6 NM18:13

CD33L 279

VOR1TOU M

17.7 NM

26

5.0R

7.5 7.5

5 5

GS 176 TAS 197 VOR

CD33L

INTCPT 3000

132KT

APP

239/20 6.6 NM18:13

CD33L 279

VOR1TOU M

17.7 NM

26

ND in NAV ND in HDG (or TRK)

Energy circle



FMGS standard B3Global speed protection

In the frame of A319 development, Airbus has

implemented some of the improvements introduced

in the A330/A340 in particular in the speed

protection domain.

A package of modifications called Global speed

protection, involving FCU and FMGC changes is

now available with the B546 standard only.

(modification n26497).

In order to keep the commonality with the A320FMGS B398 this function can be deactivated. (anti-

mod n 28290).


18/34


Main improvements are:

When the airspeed reaches a speed/Mach limit,the speed excursion is counteracted by an

increased authority in pitch (up to 0.3g).

This protection is active in: OPEN mode

ALT *

V/S or FPA

This improvement applies when VMO-MMO orVFE +2 is reached or below VLS + delta.



19/34



Automatic reversion from V/S to OPEN orFPA to OPEN mode is deleted.

The following behavior applies:

When reaching the speed/Mach limit in V/S or FPA

mode, AP/FD gives order to maintain this speed or

Mach limit.

Aircraft will remain in V/S or FPA mode but the

trajectory will be modified to keep the aircraft within

the speed envelope.(VMIN or VMAX).


20/34


Global speed protection With old FMGC: If the pilot selects an excessive V/S

target in climb a mode reversion occurs.

120

140

160

120

140

160

120

140

160

SPEED V/S+3900HDG SPEED V/S+3900HDG THR CLB OP CLB HDG

When reaching VLS:

Reversion to

THR CLB andOP CLB


21/34


Global speed protection With new FMGC: If the pilot selects an excessive

V/S target in climb, no reversion occurs.

120

140

160

120

140

160

120

140

160

SPEED V/S+3900HDG SPEED V/S+3900HDG

When reaching VLS

No reversion

Speed protection

activated

VLS is maintained

SPEED V/S+3900HDG


22/34


Global speed protection With old FMGC: If the pilot selects an excessive V/S

target in descent, a reversion occurs.

180

200

220

180

200

220

180

200

220

SPEED V/S-1500HDGSPEED V/S-1500HDG THR IDLE OP DES HDG

1

Reversion to OPEN mode toward the FCU

altitude when reaching VMAX


23/34



180

200

220

180

200

220

180

200

220

SPEED V/S-1500HDGSPEED V/S-1500HDG

1

No reversion when reaching VMAX: speed

protection activated, VMAX is maintained

SPEED V/S-1500HDG

With new FMGC: If the pilot selects an excessive

V/S target in descent, no reversion occurs:


24/34


Global speed protection Automatic reversion from OPEN modes to V/S

or FPA is deleted. (FDs not followed by thecrew)

When, in OPEN DES mode, the speed decreases

and reaches VLS-2 (VLS-17 with speedbrakes)

or

When, in OPEN CLB mode, the speed or Mach

increases and reaches VMAX + 4:

Flight Director bars or FPD are suppressed. TheA/THR if active reverts to SPEED mode.)


25/34


Global speed protection With old FMGC: If the pilot does not follow FD pitch

orders in open descent, a reversion occurs

55 0020

80

1 FD 2A / THR

OP DESTHR IDLE NAV

209 21 22 23

220

200

1802020

1010

1010

ALT

3000

050

060

STD

13

55 0020

80

1 FD 2A / THR

OP DESTHR IDLE NAV

209 21 22 23

200

180

1602020

1010

1010

ALT

3000

050

060

STD

13

55 0020

80

1 FD 2A / THR

V/S-1300SPEED NAV

209 21 22 23

200

180

160

1402020

1010

1010

ALT

3000

050

060

STD

13

When reaching VLS:

Reversion to SPEED and

V/S (on current V/S)

FD pitch order changed


26/34


Global speed protection With new FMGC: If the pilot does not follow FD

pitch orders in open descent, no reversion occurs:

55 0020

80

1 FD 2A / THR

OP DESTHR IDLE NAV

209 21 22 23

220

200

1802020

1010

1010

ALT

3000

050

060

STD

13

55 0020

80

1 FD 2A / THR

OP DESTHR IDLE NAV

209 21 22 23

200

180

1602020

1010

1010

ALT

3000

050

060

STD

13

55 0020

80

A / THR

SPEED

209 21 22 23

200

180

160

1402020

1010

1010

ALT

3000

050

060

STD

13

When reaching VLS:

SPEED mode engages

FDs are removed


27/34


Global speed protection With old FMGC: If the pilot does not follow FD pitch

orders in open climb, a reversion occurs:

55 0020

80

1 FD 2A / THR

OP CLBTHR CLB NAV

209 21 22 23

340

320

2802020

1010

1010

ALT7000

050

060

STD

7

300

55 6080

40

1 FD 2A / THR

OP CLBTHR CLB NAV

209 21 22 23

340

320

3002020

1010

ALT7000

050

060

STD

10107

56 0020

80

A / THR

SPEED NAV

209 21 22 23

360

340

320

3002020

1010

1010

ALT7000

060

STD

7

290

V/S+7001 FD 2

When reaching VMAX:

Reversion to SPEED and V/S

FD pitch order changes


28/34


Global speed protection With new FMGC: If the pilot does not follow FD

pitch orders in open climb, no

reversion occurs

55 0020

80

1 FD 2A / THR

OP CLBTHR CLB NAV

209 21 22 23

340

320

2802020

1010

1010

ALT

7000

050

060

STD

7

300

55 6080

40

1 FD 2A / THR

OP CLBTHR CLB NAV

209 21 22 23

340

320

3002020

1010

ALT

7000

050

060

STD

10107

56 0020

80

A / THR

SPEED

209 21 22 23

360

340

320

3002020

1010

1010

ALT7000

060

STD

7

290

When reaching VMAX: SPEED mode engages

FD is removed


29/34


Global speed protection Other improvement:

AP disconnection logic is modified to match the

FMA blank logic.

AP disconnects and FMA is blank when: bank angle> 45,

or

pitch attitude > 25 or < -13.


30/34


Miscellaneous Other options available on FMGS B3 (B546 only)

Increased Nav database capacity to 400 KWD

ACARS/PRINTER interfaces


31/34


Miscellaneous New FMGS A3 and B3 cancel:

OEB 132 (Unexpected thrust reduction when

reaching the cruise flight level).

OEB 134 (Incorrect NAV guidance in standard

arrival).

OEB 127 (Incorrect rollout guidance around QFU18). Applicable to A321only.


32/34


Miscellaneous New FMGS A3 and B3 inhibit the alpha floor in

single engine when the slats are extended

this avoids asymmetric thrust not commanded by

the pilot when alpha-floor is reached (low speed,

close to VMCA).

They also provide an automatic speedbrake

retraction at go-around if the ELAC L80 is

installed (mod n 27276).


33/34


FCU option (M11 standard ) FDs in go around

In order to ease the go around guidance, a new

modification enables to restore the FD bars and

arms the Autothrust at go around engagement,

whatever the previous status was, (FDs OFF or

TRK-FPA selected or A/THR off).

This modification requires the FCU M11 standard

retrofit and a specific pin program.


34/34

Conclusion It is not planned to improve A3 and B3

standards in the future.

Next improvements being brought by 2 new

FMGS produced by 2 different FMS

manufacturers:

SMITH-SEXTANT

HONEYWELL-SEXTANT

fmgs new standards

Documents