Autothrust

Also from: A/THR

The autothrust has 2 channels, each channel controlled by the respective FMGC. Each channel can control thrust through 2 engine interface units and 2 electronic engine controls. The autothrust is automatically armed when the thrust levers are set for takeoff (TOGA or FLEX/MCT).

In flight, beyond the CL detent (2 engines) or the FLEX/MCT detent (OEI) the thrust may be manually controlled. Retarding the thrust levers to IDLE in a landing disconnects the A/THR.

If one of the disconnect buttons is pushed for at least 15s, the A/THR (and Alpha Floor) is inhibited for the rest of the flight.

Modes

SPEED	A/THR adjusts thrust to maintain a target speed
THR	A/THR sets a given thrust

Quadrants

IDLE
CL	max climb thrust
FLEX/MCT	flex takeoff or max continuous thrust
TOGA	maximum takeoff or go around thrust

Failures

ENG1(2) EPR MODE FAULT

- when EPR is lost the autothrust is disconnected
- both engines must be switched to N1 mode
- the N1 gauge now includes thrust lever position and max N1

THR LK appears on the FMA if the A/THR disconnects due to failure. The thrust remains at the current setting. If manually disconnected the thrust goes to the TLA [Thrust Lever Angle] .

Categories: Airbus A330 | Auto Flight