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The following procedure is not displayed on the ECAM:
If the message occurs during ILS/LOC approach (LOC green):
DISREGARD it.
If the message occurs during climb, cruise, or descent:
Check the navigation accuracy using raw data.
If the check is positive:
NAV mode and ND ARC/ROSE NAV may be used.
If the check is negative:
HDG/TRK mode and raw data must be used.
When possible, compare the FM position with the GPIRS position, on the POSITION
MONITOR page.
If one FM position agrees with the GPIRS position on the POSITION MONITOR page:
Use the associated FD/AP.
If not:
Deselect GPS and revert to basic information.
If the message occurs during a non precision approach:
Overlay approach:
SELECT HDG or TRK, and use raw data.
GPS or RNAV approach:
GO AROUND or fly visual, if visual conditions are met.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
ABNORMAL AND EMERGENCY PROCEDURES
NAVIGATION
A330/A340 FLEET PRO-ABN-34 P 37/140
FCOM 19 AUG 10
NAV FM/GPS POS DISAGREE
Applicable to:
L2 The FMS and GPS positions differ by more than:
A longitude threshold ‐ that depends on the latitude:
• 0.5 min for latitude below 45 °
• 0.7 min for latitude at, or above, 45 °, and below 60 °
• 1 min for latitude at, or above, 60 °, and below 70 °
‐ A latitude threshold of 0.5 min, regardless of the latitude.
L1 A/C POS.................................................................................................................................CHECK
The following procedure is not displayed on the ECAM:
If the message occurs during ILS/LOC approach (LOC green):
DISREGARD it.
If the message occurs during climb, cruise, or descent:
Check the navigation accuracy using raw data.
If the check is positive:
NAV mode and ND ARC/ROSE NAV may be used.
If the check is negative:
HDG/TRK mode and raw data must be used.
Consider switching off the terrain functions of the EGPWS.
When possible, compare the FM position with the GPIRS position, on the POSITION
MONITOR page.
If one FM position agrees with the GPIRS position on the POSITION MONITOR page:
Use the associated FD/AP.
If not:
Deselect GPS and revert to basic information.
If the message occurs during a non precision approach:
Overlay approach:
SELECT HDG or TRK, and use raw data.
GPS or RNAV approach:
GO AROUND or fly visual, if visual conditions are met.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
ABNORMAL AND EMERGENCY PROCEDURES
NAVIGATION
A330/A340 FLEET PRO-ABN-34 P 38/140
FCOM 19 AUG 10
NAV IR 1+2 (1+3) (2+3) FAULT
Applicable to:
ATT HDG SWTG................................................................................. CAPT ON 3 (NORM) (NORM)
If IR (affected) available in ATT mode:
IR (AFFECTED) MODE SEL.................................................................................................. ATT
If IR (affected) totally faulty:
IR (AFFECTED) P/B...............................................................................................................OFF
L2Note: The crewmember on the affected side can recover IR information, by using the EFIS
DMC rotary selector (copy of the opposite side).
L1 SPD BRK.......................................................................................................................DO NOT USE
If the trim tank pumps are operative:
IF CG AFT 32 %:
T TANK MODE................................................................................................................FWD
L2 Fuel consumption is increased by approximately 1 %.
L1 If the trim tank pumps are inoperative, or not installed:
IF CG AFT 32 % AND WHEN SPD > 270 KT AND NOT IN CLIMB:
T TANK MODE................................................................................................................FWD
L2 Fuel consumption is increased by approximately 1 %.
L1
ASSOCIATED PROCEDURES
F/CTL ALTN LAW
(PROT LOST)
MAX SPEED...........................................................................................................................305/.82
To be continued on next page
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
ABNORMAL AND EMERGENCY PROCEDURES
NAVIGATION
A330/A340 FLEET PRO-ABN-34 P 39/140
FCOM 19 AUG 10
NAV IR 1+2 (1+3) (2+3) FAULT (Cont'd)
L12
STATUS
SPD BRK.......................................................DO NOT USE
MAX SPEED............................................................ 305/.82
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 8(77)
