Robinson R66 - Roll) Servo Assembly

Page 22.4 Chapter 22 Autopilot JUL 2020
22-20 (Roll) Servo Assembly
A. Removal
1. Turn battery & avionics switches off and pull out AUTOPILOT (5 amp) circuit
breaker at panel.
2. Remove F680-3 and F445-1 collective covers. Remove G702-7 cover assembly
under pilot's seat.
CAUTION
Do not change the length of A336-8 push-pull tube and A127-3
rod ends center-to-center dimension (4.27–4.33 inches).
3. Position cyclic stick full left and apply cyclic friction. Remove hardware securing
D354-4 (roll) servo assembly arm to A336-8 push-pull tube's rod end.
4. Disconnect servo harness from 01311-03-11 flight control computer's J3 ROLL
receptacle. Cut and discard ty-raps securing servo harness to autopilot harnesses.
5. Support servo and remove hardware securing servo's D352-14 block assembly to
keel panel and D353-5 brace assembly. Carefully remove servo from under pilot's
seat.
B. Installation
1. Turn battery & avionics switches off and pull out AUTOPILOT (5 amp) circuit
breaker at panel. Position cyclic stick full left and apply cyclic friction.
2. Position D354-4 (roll) servo assembly under pilot's seat and install hardware
securing servo's D352-14 block assembly to keel panel and D353-5 brace assembly.
Tighten screws. Verify security.
3. Connect servo harness to 01311-03-11 flight control computer's J3 ROLL
receptacle. Install ty-raps securing servo harness to autopilot harnesses as required.
Cinch ty-raps until snug without over-tightening, and trim tips flush with heads.
Verify harness security.
4. Install hardware securing servo arm to A336-8 push-pull tube's rod end. Standard
torque bolt per § 20-32 and torque stripe per Figure 5-1. Verify security.
5. Verify length of A336-8 push-pull tube and A127-3 rod ends center-to-center
dimension is 4.17–4.23 inches.
6. Verify freedom of flight controls through full travel with and without friction applied.
7. Push in AUTOPILOT circuit breaker (5 amp) at panel. Perform ground checks as
appropriate per § 22-61.
8. Install G702-7 cover assembly under pilot's seat. Install F445-1 and F680-3
collective covers. Verify security.