Technical data

13773-001
27-20
Page 14 31 July 2001
D. Yaw Trim Cartridge (See Figure 27-203)
(1) Removal - Yaw Trim Cartridge
(a) Remove left mid console circuit breaker trim. (Refer to 25-10)
(b) Remove cotter pin, castellated nut, washers, bushing, spacers, and bolt securing trim car-
tridge to console bracket.
(c) Remove cotter pin, castellated nut, washers, and bolt securing trim cartridge push/pull rod
to left torque tube actuation arm and remove from airplane.
(2) Installation - Yaw Trim Cartridge
(a) Position trim cartridge push/pull rod on left torque tube actuation arm and install cotter pin,
castellated nut, washers, and bolt.
(b) Install cotter pin, castellated nut, washers, bushing, spacers, and bolt securing trim car-
tridge to console bracket.
(c) Perform Rudder System Rigging Adjustment/Test. (Refer to 27-20)
(d) Install Left Mid Console Circuit Breaker Trim. (Refer to 25-10)
(3) Inspection/Check - Yaw Trim Cartridge
(a) Verify correct rudder system rigging. (Refer to 27-20)
(b) Verify yaw trim cartridge is adjusted to hold rudder in neutral position +/- 1°.
(c) Verify positive clearance between trim cartridge and actuation pulley under full range of
trim motor positions.
(d) Verify minimum rod end thread engagement of 0.312 inch (0.79 cm).
(e) Verify proper installation of safety wires and cotter pins on all fasteners.
E. Yaw Trim Servo
(1) Removal - Yaw Trim Servo
(a) Disconnect Pitch/Yaw Trim circuit breaker.
(b) Remove composite rudder tip from bottom of rudder.
(c) Disconnect yaw trim wire harness.
(d) Disconnect ground wires.
(e) Disassemble connector.
(f) Disconnect cable ties securing wire harness to rudder.
(g) Disconnect trim actuation arm from rudder trim tab assembly.
(h) Remove rivets securing yaw trim servo to rudder and remove servo assembly from air-
plane.
(2) Installation - Yaw Trim Servo
(a) Position yaw trim servo to rudder and secure with rivets.
(b) Connect trim actuation arm to rudder trim tab assembly so that actuation arm extends
approximately 0.38 inch past nut.
(c) Connect cable ties securing wire harness to rudder.
(d) Assemble wire harness connector.
(e) Connect ground wires.
(f) Connect yaw trim servo wire harness connector.
(g) Install composite rudder tip to bottom of rudder.
(h) Reset Pitch/Yaw Trim circuit breaker.
(3) Adjustment/Test - Yaw Trim Servo
(a) TBD.