AD 69-08-07

69-08-07 LOCKHEED: Amdt. 39-752. Applies to Model L-188 Series airplanes.

Compliance required within the next 400 hours' time in service after the effective date of this AD, unless previously accomplished.

To detect cracks in the lower wing surfaces of Electra aircraft, accomplish the following:

(1) Visually inspect the lower wing plank surfaces and areas around fasteners, including planks one through eight between W.S. 157 and W.S. 219 in accordance with the procedure outlined in Paragraphs A through E of FAA approved Lockheed Service Bulletin 88/SB- 669, or later FAA approved revisions.

(2) If cracks exist, appropriate repair must be accomplished before further flight in accordance with Paragraph F of FAA approved Lockheed Service Bulletin 88/SB-669, or in a manner approved by the Chief, Aircraft Engineering Division, FAA Western Region.

(3) Report all results of this inspection whether accomplished before or after the effective date of this AD, to the Chief,Aircraft Engineering Division, FAA Western Region. Reports must include crack locations and length, if any, aircraft serial number, and accumulated hours' time in service. The data received in the required reports will form the basis for any further AD action that may be required. (Reporting approved by the bureau of the Budged under BOB No. 04-R0174.)

Airplanes with cracks may be flown in accordance with special flight permits issued pursuant to FAR 21.197 to a base where repair can be accomplished.

This amendment becomes effective on April 17, 1969.