AD 77-08-01

77-08-01 PIPER: Amendment 39-2871. Applies to Models PA-24, PA-24-250 and PA- 24-260, Serial Nos. 24-1 through 24-5047; Model PA-24-400, Serial Nos. 26-2 through 26-148; Model PA-30, Serial Nos. 30-2 through 30-2000; Model PA-39, Serial Nos. 39-1 through 39- 155; certificated in all categories except aircraft incorporating Piper Kit number 760 914.

To prevent possible hazards in flight associated with aileron spar cracks, accomplish the following:

(a) Within the next 100 hours in service from the effective date of this AD or upon the attainment of 1000 total hours in service, whichever is later, and at intervals not to exceed 100 hours in service from the last inspection, inspect and alter as necessary in accordance with the instructions sections of Piper Service Letter No. 787 dated December 1, 1976, or equivalent.

(b) Upon the incorporation of Aileron Outboard Hinge Bracket Replacement, Piper Kit No. 760 914 or equivalent, compliance with the requirements of thisAD may be dispensed with.

(c) Equivalent inspections and alterations must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region.

(d) Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region may adjust the inspection intervals specified in this AD.

This amendment becomes effective April 18, 1977.