82-26-04 DORNIER: Amendment 39-4518. Applies to Model DO28D-1 (Serial Nos. 4036, 4037, 4050, 4055 through 4058, 4303, 4308 through 4318, 4321 through 4325, 4331 and 4332) airplanes, certificated in any category, when equipped with ARC PA-500A autopilot actuators.
COMPLIANCE: Required as indicated, unless already accomplished.
To prevent restriction of control movement due to jamming of the ARC PA-500A actuator gear train, accomplish the following:
(a) Within the next 100 hours time-in-service after the effective date of this AD and thereafter at intervals not to exceed 100 hours time-in-service, inspect the ARC PA-500A actuator in accordance with Dornier Service Bulletin No. 1069-2820, dated May 27, 1980, which incorporates ARC Field Engineering Service Bulletin No. 181. Prior to further flight correct any unsafe condition noted by adjustment or replacement of parts as necessary.
(b) Within 12 months after the effective date of this AD, modify the ARC Model PA-500A actuator(s) in accordance with Dornier Service Bulletin No. 1069-2820, dated May 27, 1980, which incorporates ARC Field Engineering Service Bulletin No. 181.
(c) The inspections required by paragraph (a) of this AD may be discontinued when the modifications required in paragraph (b) of this AD have been accomplished.
(d) Airplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished.
(e) The intervals between repetitive inspections required by this AD may be adjusted up to 10 hours time-in-service to allow them to be accomplished concurrent with other scheduled maintenance on the airplane.
(f) An equivalent method of compliance with this AD may be used if approved by the Manager, Aircraft Certification Staff, AEU-100, Europe, Africa, and Middle East Office, FAA, c/o American Embassy, Brussels, Belgium.
This amendment becomes effective on December 27, 1982.