Landing Gear Transfer Unit
The purpose of the landing gear transfer unit is to supply the volume of hydraulic fluid
needed to raise the landing gear at the normal rate when system A engine–driven pump
volume is lost. The system B engine–driven pump supplies the volume of hydraulic fluid
needed to operate the landing gear transfer unit when all of the following conditions exist:
- Airborne.
- No. 1 engine RPM drops below a limit value.
- Landing gear lever is positioned UP.
- Either main landing gear is not up and locked.
