Originally Posted by
FlightDetent
You were right to note SRS-TO and SRS-GA are not exactly the same.
T/O DSC-22_30-40-20-20
G/A DSC-22_30-40-90-20
What I read is the TO-SRS will engage with TL at TOGA/FLX + flaps/slats extended
on the ground (with V2 inserted) or 5 sec after liftoff (no V2 inserted).
So, after you lose it through any of the disengagement conditions, you won't get it back.
However, setting TL=TOGA (from some other position) while airborne with flap lever position not in zero, will get you the GA-SRS mode.
then (FCOM)
The SRS GA mode disengages when one of the following occur:
- ‐ At the go-around acceleration altitude (GA ACC ALT), or if ALT* or ALT CST* engages (above 400 ft RA)
- ‐ If the flight crew engages another vertical mode
- ‐ If the selected target altitude is above the aircraft altitude and the flight crew selects a speed: SRS GA reverts to OP CLB
- ‐ If the AP/FD TCAS mode engages upon a RA.
Note: 1. In Engine Out conditions, the SRS GA mode does not automatically disengage at EO ACC ALT.
I understand, so to summarise based on the info from the FCOM on departure, if one was to go from FLX to TOGA above the accel alt, all engines operating, you’ll remain in CLB mode and it won’t go back to SRS as SRS TO has been disengaged by the accel alt.
is this correct?