The function of the thrust reverser system is to supply reverse thrust after aircraft landing. This decreases the speed of the aircraft on the landing strip and when the aircraft taxies.

The thrust reverser system is an electrically controlled, hydraulically-actuated pivot door type thrust reverser.

There are two thrust reversers, one on each engine. Each thrust reverser has a fixed structure made of two side beams and a forward attachment assembly.

The flange on the front of the forward attachment assembly attaches the thrust reverser to the aft part of the engine. There are two pivot doors for each assembly (upper and lower pivot door) on the side beams. Hydraulically operated pivot door actuators move the pivot doors to the stowed and locked position or to the deployed position.

When the system is in the forward thrust position, the pivot doors are stowed and locked. In this position, the thrust reverser is the exhaust nozzle of the engine and points the engine exhaust (mixed core gas and fan air) rearward.

When the system is in the reverse thrust position, the pivot doors are deployed. In this position, the thrust reverser points the engine exhaust forward.

This supplies reverse thrust and decreases the speed of the aircraft. Isolate the thrust reverser before performing a maintenance procedure on or near it.

Isolate the thrust reverser before performing a maintenance procedure on or near it. It is permitted to use reverse thrust aid to decrease the aircraft speed on the taxiway.

It is not permitted to use reverse thrust to taxi the aircraft rearward. The thrust reverser units are special for the left or the right installation and are not interchangeable. The EICAS messages display shown gives the related messages for the thrust reverser.

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