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A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SUPPLEMENTARY PROCEDURES
AUTO FLIGHT - FMGS RESET AND OTHER ABNORMAL PROCEDURES
A318/A319/A320/A321 FLEET PRO-SUP-22-10 P 11/28
FCOM 19 AUG 10
SELECT the PROG page and enter CRZ FL.
SELECT the PERF page and enter CI.
CHECK or reengage (as appropriate) the relevant speed/Mach target and vertical mode.
Redefine the flight plan for the remainder of the flight, as the opportunity presents itself.
If both “MAP NOT AVAIL” and “SET OFFSIDE RNG/MODE” remain displayed on one ND, or if
“OFFSIDE FM CONTROL” remains displayed, temporarily SELECT a different mode or range
on the corresponding EFIS control panel..
PERFORM a NAV accuracy check, when possible.
A manual FM position update should be considered, if MIX IRS and actual positions differ by
more than 20 nm.
Applicable to:
,
,
MSN,,,,
DUAL RESET WITH LOSS OF DATA AND AUTORECOVERY
Four successive dual resets in 3 min erases all pilot-entered data (F-PLN, GW, CRZ FL, CI...).
When FMGS recovery is obtained:
The FM position bias is lost. The FM position returns ‐ to the MIX IRS position.
‐ Autotuning the VOR/DME is restored, based on the aircraft’s IRS position.
‐ FMGS tuning of the ILS and ADF is not possible.
‐ Lateral and vertical managed mode cannot reengage.
‐ The “CAB PR LDG ELEV FAULT” ECAM message is displayed.
‐ A map display may be lost on one ND.
PROCEDURE
When the system has recovered:
SELECT DIR TO the required downpath waypoint.
SELECT LAT REV at the downpath waypoint and redefine the DESTINATION.
SELECT the FUEL PRED page and ENTER the ZFW and ZFWCG values.
SELECT the PROG page and enter CRZ FL.
SELECT the PERF page and enter CI.
CHECK or reengage (as appropriate) the relevant speed/Mach target and vertical mode.
Redefine the flight plan for the remainder of the flight, as the opportunity presents itself.
If both “MAP NOT AVAIL” and “SET OFFSIDE RNG/MODE” remain displayed on one ND, or if
“OFFSIDE FM CONTROL” remains displayed, temporarily SELECT a different mode or range
on the corresponding EFIS control panel..
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SUPPLEMENTARY PROCEDURES
AUTO FLIGHT - FMGS RESET AND OTHER ABNORMAL PROCEDURES
A318/A319/A320/A321 FLEET PRO-SUP-22-10 P 12/28
FCOM 19 AUG 10
PERFORM a NAV accuracy check, when possible.
A manual FM position update should be considered, if MIX IRS and actual positions differ by
more than 20 nm.
Applicable to:
,
,
MSN,,
4538,,
FMS DEGRADED MODE
In some remote cases (several automatic resets in a row on one or both FMS), the affected
FMS(s) may enter a “degraded mode”, with no predictions.
The intent of this degraded mode is to keep maximum use of the FMS and related functions.
The characteristics of this FMS degraded mode are the following:
The predictions are lost on the affected FMS(s). All predictions ‐ are replaced by dashes on
MCDU pages.
‐ The vertical profile and managed speed computations are lost on the affected FM(s) (in
Approach phase, VAPP is correctly computed and managed speed is available).
‐ Managed vertical guidance and managed speed (if previously used) are lost and revert to
selected mode.
‐ Lateral path computation and guidance remain available.
‐ The MCDU displays the “FM PREDICTIONS LOST” message.
Note: 1. If predictions are lost on one FMS only, all managed modes are available when
using the other side AP.
2. The Approach phase must be activated manually.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SUPPLEMENTARY PROCEDURES
AUTO FLIGHT - FMGS RESET AND OTHER ABNORMAL PROCEDURES
A318/A319/A320/A321 FLEET PRO-SUP-22-10 P 13/28
FCOM 19 AUG 10
PROCEDURE
If the message “FM PREDICTIONS LOST” is displayed:
‐ If vertical managed guidance and/or prediction are not deemed necessary, keep using
the FMS as needed for Lateral navigation only. Use selected modes for vertical and
speed guidance.
Note: If only one FMS has entered the degraded mode, consider using the other AP.
‐ If vertical managed guidance and/or predictions are required, RE-ENTER a Cost
Index (CI) value on INIT A or PERF page (predictions for the active flight plan are then
recomputed).
Note: In approach phase, a direct CI entry is not allowed : it is then not possible to
recover predictions. However, entry of the current altitude in the CRZ FL field
will force the CRZ phase and thus, allow to reenter the CI. The approach phase
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A320机组操作手册FLIGHT CREW OPERATING MANUAL 14(60)
