AD/CONVAIR/27 - Drag Strut Shearbolt (Cth)

AIRWORTHINESS DIRECTIVE For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Kelowna Flightcraft (General Dynamics/Convair) Series Aeroplanes AD/CONVAIR/27 Drag Strut Shearbolt 11/2006

Applicability: GENERAL DYNAMICS Models 340/440 aeroplanes, including those converted to Turbo-propeller power. Requirement: To detect cracks originating at the shearbolt bore in the drag strut, and prevent possible failure of the landing gear, accomplish the following:

1. Non-Modified Struts (See Definitions, below).

(a) Perform a disassembly inspection of the nose landing gear, left hand, upper drag strut for crack development in the area of the clutch plate to strut shear bolt attach hole per General Dynamics Service Bulletin 640(340) S.B. No. 32-8, dated 10 August 1973, or later FAA-approved revisions, and modify the strut per Part III of the Bulletin.

(b) If no cracks are found, repeat the inspection in Requirement 1(a) above.

(c) If cracks are located, replace the drag strut with new or serviceable parts of the same type design.

2. Modified or New Struts (See Definitions, below).

(a) Perform a disassembly inspection of the nose landing gear, left hand upper drag strut in the area of the clutch plate to strut shear bolt attach hole as specified in General Dynamics Service Bulletin No. 32-8, or later FAA-approved revisions.