To deploy the reversers, the LGCIU's must sense that both main gear struts are compressed, and a reverse signal from the thrust lever angle (TLA) must be received from at least one SEC.

To deploy the reversers, the LGCIU's must sense that both main gear struts are compressed, and a reverse signal from the thrust lever angle (TLA) must be received from at least one SEC.

• A. Both main gear struts compressed and reverse signal from TLA from at least one SEC
• B. Only one main gear strut compressed
• C. Thrust reverser deployed automatically at max speed
• D. Cooling air required

Answer: (A)

Thrust reverser deployment on the A320 is controlled by interlocks that require two things to be true at the same time: the airplane must be on the ground (indicated by both main gear struts being compressed) and the pilot must command a reverse via the thrust lever angle, with that command being provided by at least one of the two SECs. The weight-on-wheels condition ensures reversers only operate when the aircraft is on the runway and braking is appropriate, while the TLA signal confirms the pilot’s explicit intent to use reverse thrust. The redundancy of needing a signal from at least one SEC prevents a single failure from disabling reversers. So, both main gear struts compressed and a reverse signal from the TLA from at least one SEC must be present for deployment.

Thrust reverser deployment on the A320 is controlled by interlocks that require two things to be true at the same time: the airplane must be on the ground (indicated by both main gear struts being compressed) and the pilot must command a reverse via the thrust lever angle, with that command being provided by at least one of the two SECs. The weight-on-wheels condition ensures reversers only operate when the aircraft is on the runway and braking is appropriate, while the TLA signal confirms the pilot’s explicit intent to use reverse thrust. The redundancy of needing a signal from at least one SEC prevents a single failure from disabling reversers. So, both main gear struts compressed and a reverse signal from the TLA from at least one SEC must be present for deployment.