63-21-05: Main and Nose Retraction Links

63-21-05 NAVION and TWIN NAVION: Amdt. 624 Part 507 Federal Register October 2, 1963. Applies to All Navion Serial Numbers NAV-4-2 and up, and all Twin Navion Aircraft, Temco D-16, Temco D-16A, Dauby, Riley, and Camair 480. Compliance required within the next 50 hours' time in service after the effective date of this directive. Service experience indicates that the unsafe condition in the main and nose gear retraction links which prompted the issuance of AD's 61-12-04 and 62-14-04 cannot in all cases be detected by the inspection as required in those AD's. Therefore, the following must be accomplished: (a) Replace the main gear retraction links with revised assembly Navion P/N 143- 33165-20, Temco P/N 57001-9 or FAA approved equivalent having the longer lap welded center section that completely covers the turned down part of the end fitting. (b) Replace the nose gear retraction link with revised assembly Navion P/N 145- 34106-20, Camair P/N 1-6031 or FAA approved equivalent having the longer lap welded center section that completely covers the turned down part of the end fitting. (c) Approval of equivalent parts shall be obtained from an FAA Regional Engineering and Manufacturing Branch or Aircraft Engineering Division, as appropriate. This supersedes AD's 61-12-04 and 62-14-04. This directive effective November 1, 1963. Revised August 25, 1965.