AD 63-20-04

63-20-04 GENERAL DYNAMICS: Amdt. 622 Part 507 Federal Register September 26, 1963. Applies to All Models 22 and 22M Aircraft.

Compliance required as indicated.

Due to failures of flap actuator screwjacks, accomplish the following:

(a) Within 1,500 hours' time in service after the effective date of this AD unless already accomplished, replace all flap actuator screwjack end cap assemblies P/N 1162D53 and P/N 1162D54, with end cap assemblies reworked to provide additional lateral movement in accordance with General Dynamics/Convair 880 Alert Service Bulletin No. A27-68 dated March 22, 1963, or 880M Alert Service Bulletin No. A27-36 dated March 22, 1963, as applicable, or an FAA, Western Region, Engineering and Manufacturing Branch approved equivalent modification.

(b) Within 3,500 hours' time in service after the effective date of this AD unless already accomplished, conduct a magnetic particle inspection or an FAA approved equivalent inspection of all flap actuatorscrewjack shafts paying particular attention to the section of the screwjack shaft that is above the main thread. Replace a cracked flap actuator screwjack shaft with an uncracked screwjack shaft before further flight.

(General Dynamics/Convair 880 Alert Service Bulletin No. A27-68 dated March 22, 1963, and 880M Alert Service Bulletin No. A27-36 dated March 22, 1963, pertain to this same subject.)

This directive effective October 28, 1963.