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ADR 1 and ADR 2 speeds will be in agreement, but incorrect. Therefore, flight controls will consider
the remaining correct source as being faulty, and will reject the only correct source. The following
ECAM procedure avoids that the flight controls use 2 erroneous, but coherent, sources.
L1�� If all probes heating is lost on the CAPT and/or F/O side:
PROBE/WINDOW HEAT..........................................................................................................ON
L2 In some failure conditions, probe heating may be recovered.
L1�� IF UNSUCCESSFUL:
�� If ADR 3 operative and ON:
ADR 1(2) P/B................................................................................................................... OFF
L2 Depending on the status of the static, AOA, and TAT heating, the ECAM requires that
either ADR 1 or 2 be switched OFF.
Note: In case of subsequent, significant, speed discrepancy between the 2 remaining
ADRs, the “ADR DISAGREE” ECAM caution will be triggered.
L1�� If ADR 3 failed or OFF:
L2No action is required, as long as there are no icing conditions, in order to keep 2
independent speed sources.
L1�� IF ICING EXPECTED:
ADR 1(2) P/B.............................................................................................................OFF
L2 Depending on the status of the static, AOA, and TAT heating, the ECAM requires that
either ADR 1 or 2 be switched OFF.
L1UNREL SPD PROC.............................................................................................. APPLY
L2 Only one ADR is available, and the corresponding pitot probe may be affected by ice
accretion. Be prepared to use the UNRELIABLE SPEED INDICATION/ADR CHECK
PROC procedure.
L1
ASSOCIATED PROCEDURES
NAV ADR FAULT
To be continued on next page
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
ABNORMAL AND EMERGENCY PROCEDURES
ICE AND RAIN PROTECTION
A330/A340 FLEET PRO-ABN-30 P 29/56
FCOM 19 AUG 10
ANTI ICE CAPT + F/O PITOT HEAT (Cont'd)
STATUS
�� If ADR 3 failed or OFF:
�� IF ICING EXPECTED:
ADR 1(2) P/B............................................................. OFF
UNREL SPD PROC...............................................APPLY
INOP SYS
CAPT PITOT
F/O PITOT
CAPT PROBES (1)
F/O PROBES (2)
(1) (If all CAPT PROBES heating is lost)
(2) (If all F/O PROBES heating is lost)
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
ABNORMAL AND EMERGENCY PROCEDURES
ICE AND RAIN PROTECTION
A330/A340 FLEET PRO-ABN-30 P 30/56
FCOM 19 AUG 10
ANTI ICE CAPT + F/O PITOT HEAT
Applicable to:
L2CAPT and F/O pitot heating is lost. In case of simultaneous pitot icing and in the same amount,
ADR 1 and ADR 2 speeds will be in agreement, but incorrect. Therefore, flight controls will consider
the remaining correct source as being faulty, and will reject the only correct source. The following
ECAM procedure avoids that the flight controls use 2 erroneous, but coherent, sources.
L1�� If all probes heating is lost on the CAPT and/or F/O side:
PROBE/WINDOW HEAT..........................................................................................................ON
L2 In some failure conditions, probe heating may be recovered.
L1�� IF UNSUCCESSFUL:
�� If ADR 3 operative and ON:
ADR 1(2) P/B................................................................................................................... OFF
L2 Depending on the status of the static, AOA, and TAT heating, the ECAM requires that
either ADR 1 or 2 be switched OFF.
Note: In case of subsequent, significant, speed discrepancy between the 2 remaining
ADRs, the “ADR DISAGREE” ECAM caution will be triggered.
L1�� If ADR 3 failed or OFF:
L2No action is required, as long as there are no icing conditions, in order to keep 2
independent speed sources.
L1�� IF ICING EXPECTED:
ADR 1(2) P/B.............................................................................................................OFF
L2 Depending on the status of the static, AOA, and TAT heating, the ECAM requires that
either ADR 1 or 2 be switched OFF.
L1UNREL SPD PROC.............................................................................................. APPLY
L2 Only one ADR is available, and the corresponding pitot probe may be affected by ice
accretion. Be prepared to use the UNRELIABLE SPEED INDICATION/ADR CHECK
PROC procedure.
L1
ASSOCIATED PROCEDURES
NAV ADR FAULT
To be continued on next page
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
ABNORMAL AND EMERGENCY PROCEDURES
ICE AND RAIN PROTECTION
　
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