60-08-02 BOEING: Amdt. 131 Part 507 Federal Register April 9, 1960. Applies to All Model 75 Series Aircraft Operated in Restricted Category With a Gross Weight Exceeding 3,200 Pounds.
Compliance required not later than June 1, 1960, and at each 100 hours' time in service thereafter.
Due to reports of cracked longerons, the following shall be accomplished:
Visually inspect the fuselage longerons and fuselage diagonal bracing for cracks in the vicinity of the lower wing front spar attach fittings. All cracked structural members shall be repaired or replaced in accordance with CAR 18.