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ONE ADR...............................................................................................................KEEP ON
Keep one ADR ON to maintain the STALL WARNING protection.
TWO ADR(s)...................................................................................................................OFF
This prevents the flight control laws from using two coherent but unreliable ADR data.
EFIS DMC switching............................................................................................. AS RQRD
LDG CONF........................................................................................................USE FLAP 3
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 126/140
FCOM 19 AUG 10
UNRELIABLE SPEED INDICATION/ADR CHECK PROC - MEMORY ITEMS (Cont'd)
APP SPD................................................................................................................ VLS + 10
LDG DIST PROC....................................................................................................... APPLY
Refer to 99 Duref Cible QRH, or to the Refer to 99 Duref Cible FCOM.
�� To return to departure airport:
Keep takeoff configuration preferably.
Refer to PRO-ABN-34-W UNRELIABLE SPEED INDICATION/ADR CHECK PROC -
APPROACHES (PITCH & THRUST TABLES).
�� To accelerate and clean up after takeoff:
Accelerate and clean up the aircraft in level flight:
THRUST....................................................................................................................CLB
FLAPS.............................................................................................................RETRACT
Retract from 3 or 2 to 1, once CLB thrust is set.
Retract from 1 to 0, when the aircraft pitch is lower than the pitch for S speed (Refer
to PRO-ABN-34-W UNRELIABLE SPEED INDICATION/ADR CHECK PROC -
LEVEL-OFF (PITCH & THRUST TABLE)).
Once in clean configuration, Refer to PRO-ABN-34-W UNRELIABLE SPEED
INDICATION/ADR CHECK PROC - CLIMB/CRUISE/DESCENT (PITCH
& THRUST TABLES), Refer to PRO-ABN-34-W UNRELIABLE SPEED
INDICATION/ADR CHECK PROC - APPROACHES (PITCH & THRUST
TABLES) for flight continuation.
�� Other cases:
Refer to PRO-ABN-34-W UNRELIABLE SPEED INDICATION/ADR CHECK
PROC - CLIMB/CRUISE/DESCENT (PITCH & THRUST TABLES), Refer
to PRO-ABN-34-W UNRELIABLE SPEED INDICATION/ADR CHECK PROC -
APPROACHES (PITCH & THRUST TABLES) for flight continuation.
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 127/140
FCOM 19 AUG 10
UNRELIABLE SPEED INDICATION/ADR CHECK PROC - MEMORY ITEMS (Cont'd)
WHEN FLIGHT PATH IS STABILIZED
PROBE/WINDOW HEAT.............................................................................................................ON
TECHNICAL RECOMMENDATIONS
Respect Stall Warning and disregard “RISK OF UNDUE STALL WARNING” STATUS
message if displayed on ECAM.
To monitor speed, refer to IRS Ground Speed, or GPS Ground Speed variations.
�� If remaining altitude indication is unreliable:
Do not use FPV and/or V/S, which are affected.
ATC altitude is affected. Notify the ATC.
Refer to GPS altitude: altitude variations may be used to control level flight, and is an
altitude cue.
Refer to Radio altimeter.
CAUTION If the failure is due to radome destruction, the drag will increase and therefore
N1 must be increased by 3 % (CRZ) or 1.5 % (APP). Fuel flow will increase by
about 13 %.
AFFECTED ADR IDENTIFICATION
Crosscheck all speed indications and Refer to 99 Duref Cible QRH or Refer to 99 Duref Cible
QRH.
�� If at least one ADR is reliable:
Faulty ADR(s)..................................................................................................................OFF
REMAINING AIR DATA........................................................................................ CONFIRM
Alternates sources may be used to evaluate the air data:
‐ GPS altitude
‐ GPS and IRS Ground Speed, taking into account altitude and wind effect.
�� If affected ADR(s) cannot be identified or all ADRs are affected:
ONE ADR...............................................................................................................KEEP ON
Keep one ADR ON to maintain the STALL WARNING protection.
TWO ADR(s)...................................................................................................................OFF
This prevents the flight control laws from using two coherent but unreliable ADR data.
　
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