63-15-06 PIAGGIO: Amdt. 591 Part 507 Federal Register July 24, 1963. Applies to Model P.166 Aircraft, Serial Numbers 1, through 403.
Compliance required within 25 hours' time in service after the effective date of this AD.
To preclude failure of the elevator trim tab control system and lever, P/N 5069, because of unsound welding seams, accomplish the following:
(a) Inspect right and left levers, P/N's 5069.03 and 5069.02, respectively, for cracks or unsatisfactory machining in accordance with Piaggio Service Bulletin No. 166-30 dated February 1, 1963.
(b) If any defects specified in the service bulletin are found, before further flight replace the lever with a lever inspected and found to have no defects.
This directive effective August 23, 1963.