64-03-04 PIAGGIO: Amdt. 675 Part 507 Federal Register January 21, 1964. Applies to All Model P.166 Aircraft Equipped With Magnaghi Modification 22027 or Modification 2-22027 Shock Absorbers.
Compliance required within the next 50 hours' time in service after the effective date of this AD.
Fatigue cracks have developed inservice on nose landing gear steering control unit P/N's 4105.26 and 4105.31. To correct this condition, replace flanges in nose undercarriage unit as follows:
(a) On aircraft equipped with Modification 2-22027 shock absorber, replace old flange P/N 4105.26 with new flange P/N 4105.26A.
(b) On aircraft equipped with Modification 22027 shock absorber, replace old flange P/N 4105.31 with new flange P/N 4105.31A.
(c) Accomplish replacement as provided for in Piaggio Service Bulletin No. 166-35 dated July 8, 1963.
(Piaggio Service Bulletin No. 166-35 dated July 8, 1963, covers the same subject.)
This directive effective February 20,1964.