fdr:
The single-aisle AB new 'soft GA' feature.
a) advance TLs all the way to TO/GA detent (thrust supplied to rating limits and all the AFDS g.a. modes engage)
b) bring TLs back one step to MCT/FLEX detent. Previously this would supply MCT (CON) but now is the smart, soft-GA power.
c) reduce to CL detent when ready to resume i) CL limit, ii) ATHR control.
All modes: Max Rated (toga notch) and AST+ soft-ga + CON (flex/mct notch) are fixed thrust, ATHR cannot reach the engine in those and remains armed only.
Not able to provide the rules of calculation behind each n1/epr setting for those. Comes from the box, not displayed on the box. Visible on the EIS when the modes are active. Top-right corner of the upper central display.
The only available pilot-user modification is to overwrite the pre-pinned FMS values for
(AEO) thr-red & acc alt
(OEI) acc alt
that may or may not provide some advisories on the PFD as the aeroplane gains altitude. No effect on the active thrust.
Last edited by FlightDetent; 20th February 2023 at 12:42.