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FLYING TECHNIQUE
When the BUSS is used:
• The AP/FD and A/THR are lost
• The flight control law is in alternate law. The alpha protection and VMO/MMO warning are lost
but the stall warning remains available.
PF will fly the aircraft using the bird. CM1 will crosscheck the BUSS indications with the standby
instrument indications if reliable.
A330/A340 FLIGHT CREW TRAINING MANUAL
ABNORMAL OPERATIONS
NAVIGATION
A330/A340 FLEET AO-034 P 9/14
FCTM 17 JUN 09
The altimeters indications are based on GPS information. As the GPS altitude is less accurate
than barometric altitude, two amber dashes replace the last two digits. The crew will note that a
GPS altitude is not a FL. The vertical speed indicator is not available anymore.
For approach, a stabilized approach technique will be preferred. Flight crews should change the
aircraft configuration with wings levelled.
Prior to the retraction/extension of the next slat/flap configuration, it is preferable to fly the
higher/lower part of the green band to limit the excursion in the amber band once slat/flap is
configured
ADR CHECK PROC / UNRELIABLE SPEED INDICATION QRH PROCEDURE
Criteria: LR
Applicable to: , , , , , , , , , , , , , ,
, , , , , , ,
INTRODUCTION
The UNRELIABLE SPEED INDICATIONS / ADR CHECK PROC procedure has two objectives:
to identify and isolate the affected ADR (s), and, if not successful, to fly the aircraft until landing
without any speed reference.
It includes the following steps:
1. Memory items
2. Trouble shooting and isolation
3. Flight using Pitch/thrust references.
WHEN TO APPLY THIS PROCEDURE?
The flight crew may enter this procedure, either upon ECAM request (ADR DISAGREE or
ANTI-ICE PITOT caution), or because he suspects an erroneous indication, without any ECAM
warning.
Erroneous speed/altitude indication can be suspected by:
1. Speed discrepancy (between ADR1, 2, 3, and standby indication)
2. Fluctuating or unexpected increase/decrease/permanent indicated speed, or pressure altitude.
3. Abnormal correlation of basic flight parameters (IAS, pitch, attitude, thrust, climb rate) :
• IAS increasing, with large nose-up pitch attitude
• IAS decreasing, with large nose down pitch attitude
• IAS decreasing, with nose down pitch attitude and aircraft descending
4. Abnormal AP/FD/ATHR behavior
A330/A340 FLIGHT CREW TRAINING MANUAL
ABNORMAL OPERATIONS
NAVIGATION
A330/A340 FLEET AO-034 P 10/14
FCTM 17 JUN 09
5. 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,
associated with the OVERSPEED VFE warning, is a symptom of a real overspeed condition.
6. Inconsistency between radio altitude and pressure altitude.
7. Reduction in aerodynamic noise with increasing speed, or increase in aerodynamic noise with
decreasing speed.
8. Impossibility of extending the landing gear by the normal landing gear system.
HOW TO APPLY THIS PROCEDURE?
A330/A340 FLIGHT CREW TRAINING MANUAL
ABNORMAL OPERATIONS
NAVIGATION
A330/A340 FLEET AO-034 P 11/14
FCTM 17 JUN 09
Because the displayed information may be erroneous, the flying accuracy cannot be assumed.
Incorrect transponder altitude reporting could cause confusion. Therefore, this is an emergency
situation which requires to land as soon as possible, and a MAYDAY should be declared to advise
ATC and other aircraft of the situation.
PART 1: MEMORY ITEMS
If the safe conduct of the flight is affected, the flight crew applies the memory items. They allow
"safe flight conditions" to be rapidly established in all flight phases (takeoff, climb, cruise) and
aircraft configurations (weight and slats/flaps). The memory items apply more particularly when a
failure appears just after takeoff.
Once the target pitch attitude and thrust values have been stabilized, as soon as above safe
altitude, the flight crew will enter the QRH abnormal procedures, to level off the aircraft and
perform trouble shooting. This should not be delayed, since using the memory item parameters for
a prolonged period may lead to speed limit exceedance.
PART 2: TROUBLE SHOOTING AND ISOLATION
GENERAL
If the wrong speed or altitude information does not affect the safe conduct of the flight, the crew
will not apply the memory items, and will directly enter the QRH abnormal procedures.
　
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