Technical data

13773-001
22-10
Page 4 31 July 2001
E. Pitch Servo (See Figure 22-102)
(1) Removal - Pitch Servo
(a) Ensure BAT 1, BAT 2, and AVIONICS master switches are in off position.
(b) Pull AUTOPILOT circuit breaker.
(c) Remove baggage floor carpet and access panel CF5. (Refer to 6-00)
(d) Disconnect pitch servo plug from socket.
Note: Note location of bridle clamps on outboard elevator cable to facilitate rein-
stallation.
(e) Loosen nuts securing bridle clamps to elevator outboard cable and remove bridle from
cable.
(f) Remove bolts and washers securing pitch servo to mounting bracket and remove pitch
servo from airplane.
(2) Disassemble - Pitch Servo
(a) Remove screws and washers securing capstan cover to capstan.
(b) Remove cable guards from servo flange.
(c) Remove cotter pin, washer, and nut securing tension washers to capstan.
(d) Free bridal cable stop-ball in capstan recess by loosening set screw located inside of mid-
dle spanner-adapter tooling hole.
(e) Pull stop-ball from capstan recess and unwrap bridle cable from capstan.
(f) Remove screw and washer securing cover to servo motor.
(3) Reassembly - Pitch Servo
(a) Place tension washers on capstan and secure with washer and nut.
(b) Perform Pitch-Servo Torque Adjustment/Test.
(c) Insert and depress bridal cable stop-ball into capstan recess and tighten set screw.
(d) On the servo capstan, position the middle spanner adapter tooling hole to the 12 o’clock
position (stop-ball at top of capstan), and wrap aft bridle cable 540° counterclockwise.
(e) On the servo capstan, position the middle spanner adapter tooling hole to the 12 o’clock
position (stop-ball at top of capstan), and wrap forward bridle cable 180° clockwise.
(f) Install cable guards to servo flange.
(g) Install screws and washers securing capstan cover to servo motor.
(h) Install screw and washer securing cover to servo motor.
(4) Installation - Pitch Servo
(a) Position pitch servo to mounting bracket and secure with washers and bolts.
(b) Perform Bridle-Cable Tension Adjustment/Test.
(c) Connect pitch servo plug to socket.
(d) Install access panel CF5 and baggage floor carpet. (Refer to 6-00)
(e) Reset AUTOPILOT circuit breaker.