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RUD WITH CARE ABV 160 KT
The rudder travel limit value is frozen at the moment when the
failure occurs. Therefore, to prevent damage to the aircraft
structure, use the rudder with care, when the speed is above
160 kt. At slats’ extension, full rudder travel authority is
recovered.
INOP SYS
RUD TRV LIM
CAT 3 DUAL
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
ABNORMAL AND EMERGENCY PROCEDURES
NAVIGATION
A330/A340 FLEET PRO-ABN-34 P 90/140
FCOM 19 AUG 10
NAV ADR DISAGREE
Applicable to:
L2 This caution is triggered by the PRIMs, when they use only 2 ADRs, and when these 2 ADRs
disagree. This may occur, when:
One ADR has already ‐ been selected OFF by the pilot, or
‐ One ADR has been eliminated by the PRIM, without any caution, because it deviated from the
others.
L1 AIR SPD.............................................................................................................................X CHECK
L2Check airspeed information on both PFDs, and on the standby airspeed indicator.
L1�� IF NO SPD DISAGREE:
AOA DISCREPANCY
�� IF SPD DISAGREE:
ADR CHECK PROC...........................................................................................................APPLY
L2 Refer to 99 Duref Cible FCOM.
L12
ASSOCIATED PROCEDURES
F/CTL ALTN LAW
(PROT LOST)
Note: Following an ADR DISAGREE, detected by the PRIMs, alternate law is latched.
Resetting the PRIMs, by using the pushbutton, does not allow normal law
recovery.
Refer to 99 Duref Cible FCOM.
L1MAX SPEED...........................................................................................................................330/.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 91/140
FCOM 19 AUG 10
NAV ADR DISAGREE (Cont'd)
L12
STATUS
MAX SPEED............................................................ 330/.82
CAT 3 SINGLE ONLY
RISK OF UNDUE STALL WARN
Undue stall warnings may mainly occur, in case of an AOA
discrepancy.
RUD WITH CARE ABV 160 KT
The rudder travel limit value is frozen at the moment when the
failure occurs. Therefore, to prevent damage to the aircraft
structure, use the rudder with care, when the speed is above
160 kt. At slats’ extension, full rudder travel authority is
recovered.
INOP SYS
RUD TRV LIM
CAT 3 DUAL
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
ABNORMAL AND EMERGENCY PROCEDURES
NAVIGATION
A330/A340 FLEET PRO-ABN-34 P 92/140
FCOM 19 AUG 10
UNRELIABLE SPEED INDICATION/ADR CHECK PROC - GENERAL
Applicable to: ,
Unreliable speed indication may be due to radome damage, or due to air probe failure or
obstruction.
The indicated altitude may also be affected, if static probes are affected.
Unreliable speed cannot be detected by the ADIRU. The flight control and flight guidance
computers normally reject erroneous speed/altitude source(s), provided a significant difference is
detected.
However, they will not be able to reject two erroneous speeds or altitudes that synchronously
and similarly drift away. In this remote case, the aircraft systems will consider the remaining
correct source as being faulty and will reject it. Consequently, the flight control and flight guidance
computers will use the remaining two wrong ADRs for their computation.
Therefore, in all cases of unreliable speed situation, the pilots must identify the faulty ADR(s)
and then switch it (them) OFF. If all ADRs provide unreliable data, keep one ADR on to keep the
stall warning protection. During this failure identification time, since the flight control laws may be
affected, it is recommended to maneuver the aircraft with care until the ADR(s) is (are) switched
OFF.
Unreliable speed indications may be suspected, either by:
Speed discrepancies (between ADR 1, 2, ‐ 3, and standby instruments)
‐ Fluctuating or unexpected increase/decrease/steady indicated speed, or pressure altitude
‐ Abnormal correlation of the basic flight parameters (speed, pitch attitude, thrust, climb rate)
‐ Abnormal AP/FD/ATHR behavior.
‐ STALL warning, or OVERSPEED warnings, or a Flap RELIEF ECAM message, that contradicts
with at least one of the indicated speeds:
• Rely on the stall warning that could be triggered in alternate or direct law. It is not affected by
unreliable speeds, because it is based on angle of attack.
• Depending on the failure, the OVERSPEED warning may be false or justified. Buffet,
　
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