Pitch Control

Auto

Trim

Autopilot Commands

Side stick Commands

The pitch control is performed by the elevators and stabilizer. They are hydraulically powered and signaled from the PRIM computers. If all 3 PRIM computers fail, the SEC computers take over. The stabilizer can also be manually position using the trim wheel in the cockpit.

The A/P commands are processed by the PRIM in master control. Side stick signals, in manual flight, are processed by either one of PRIM 1 and 2 or SEC 1 and 2.

The pitch trim is driven by two hydraulic motors supplied by Blue and Yellow systems These two motors are controlled either by the three electrical motors with their associated electronics controlled by one PRIM each, or by mechanical input from the trim wheels located on the central pedestal.

In normal law, the pitch attitude is limited to 30 degrees pitch up. Two small green markers appear on the Attitude Ball.

In normal law, the pitch attitude is limited to -15 degrees pitch down. Two small green markers appear on the Attitude Ball.

In normal law, flight controls laws protect against excessive speed by pitching the aircraft up, regardless of the side stick command. Stick down commands become washed out and only a stick up command will produce a result

In normal law, flight controls laws protect against low speed by pitching the aircraft down, regardless of the side stick command. Stick up commands become washed out and only a stick down command will produce a result