Question - Describe The Investigation And Remedial Action Required If The Engine Fails To Reverse ?
Answer -
If the engine fails to reverse the following points would be investigated, and remedial action taken.
- Air start distributor not reversing. The engine controls would be moved ahead and astern whilst observing the movement of the air start distributor. If the distributor is not moving, then the air servo cylinder would be checked to ensure that it is free to move, and that air is being admitted and vented as required to achieve the movement required.
- Air start valve not opening. It is possible that the air distributor does reverse as expected, but that the required air start valve would not open to rotate the engine in the new direction. This would be investigated by turning the engine in the ahead direction so that it stops in a new position. The engine would again be tested in the astern direction to test if a starting air valve has failed to open. Any valve found faulty would be removed, freed and refitted.