Airbus FBW - triple clicks
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Airbus FBW - triple clicks
Just seeking clarifcation of reasons for the triple click 'alert' to sound. My understanding is that it occurs on a downgrade from say cat 3 to cat 1. Some other text says that it also occurs when a new altitude is selected during ALT* and the ALT knob is not pushed or pulled.
Are these statements correct and are there any other causes?
Thanks in advance
AirbusFan.
Are these statements correct and are there any other causes?
Thanks in advance
AirbusFan.
Join Date: Mar 2004
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You are both correct. The triple clicks or the cricket sounds:-
1) When the aircraft is first powered up & the FMGCs have completed their self tests
2) When there is a downgrade in the approach capability.
1) When the aircraft is first powered up & the FMGCs have completed their self tests
2) When there is a downgrade in the approach capability.
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Also;
Depending on options and FMGC standard, triple click will sound;
- If "GPS PRIMARY LOST" during approach
- With CLB + NAV modes active, NAV mode is lost or disengaged (OP CLB engages).
rgds/mcdude
Depending on options and FMGC standard, triple click will sound;
- If "GPS PRIMARY LOST" during approach
- With CLB + NAV modes active, NAV mode is lost or disengaged (OP CLB engages).
rgds/mcdude
Join Date: Jun 2001
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The following sequences, or mode reversions, are highlighted by a triple click :
V/S selection in ALT*
SPD selection in SRS
CLB (or EXP CLB) to OP CLB, upon lateral crew action while climbing toward a constraint
ALT* to V/S, upon ALT target change
FD disengagement in OPEN modes
Alerting FMA display when V/S-(FPA) target is not held
CLB to OP CLB reversion, upon profile loss
Automatic FD re-engagement in basic mode
DES to V/S upon flight plan loss, or upon no lateral crew action
FINAL DES to V/S, upon NAV loss
Reversion to V/S when selected ALT crosses the current altitude
Automatic FD re-engagement in basic lateral mode
NAV to HDG, upon NAV loss
(ILS) CAPABILITY DOWNGRADE.
Condition(s) required for CAT3/CAT2 are no longer fulfilled.
GPS PRIMARY LOST
plus a few others I guess !!!!!!!!!!!!
V/S selection in ALT*
SPD selection in SRS
CLB (or EXP CLB) to OP CLB, upon lateral crew action while climbing toward a constraint
ALT* to V/S, upon ALT target change
FD disengagement in OPEN modes
Alerting FMA display when V/S-(FPA) target is not held
CLB to OP CLB reversion, upon profile loss
Automatic FD re-engagement in basic mode
DES to V/S upon flight plan loss, or upon no lateral crew action
FINAL DES to V/S, upon NAV loss
Reversion to V/S when selected ALT crosses the current altitude
Automatic FD re-engagement in basic lateral mode
NAV to HDG, upon NAV loss
(ILS) CAPABILITY DOWNGRADE.
Condition(s) required for CAT3/CAT2 are no longer fulfilled.
GPS PRIMARY LOST
plus a few others I guess !!!!!!!!!!!!