Pitch Trim Wheel

The Pitch Trim Wheel provides mechanical control of horizontal stabilizer trim if green or yellow hydraulic pressure is available.

Trim wheels have priority over electrical control. Use of trim wheels does not disconnect the ELACs; the override mechanism ensures the computers remain synchronized with the manually selected position.

Trim wheels must be used when pitch direct law is in effect. Pitch trim is automatically reset to 0 following touchdown as the pitch attitude becomes less than 2.5°. The reset function is inoperative when the green or yellow system is unpressurized.

CG SCALE - The CG Scale indicates relation between CG location and pitch trim setting.

TRIM POSITION SCALE - Trim Position Scale indicates trim position in degrees. Normal takeoff range is marked by a green band.