AD/CONVAIR/16 - Wing Front Spar Lower Rail (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/16 Wing Front Spar Lower Rail 5/2006

Applicability: Model 340 and 440 aircraft, and all such model aircraft converted to turbopropeller power. Requirement: 1. For aircraft with 23,500 or more hours time in service:

Remove the wing leading edge and perform a visual inspection of the left and right wing front spar lower rail between wing stations 240 and 490 for cracks. If cracking is detected, repair in accordance with Requirement 3 before further flight.

2. For aircraft with less than 23,500 hours time in service:

Remove the wing leading edge and perform a visual inspection of the left and right wing front spar lower rail between wing stations 240 and 490 for cracks. If cracking is detected, repair in accordance with Requirement 3 before further flight.

During the inspections pay particular attention to the areas immediately adjacent to the leading edge joints at wing stations 248, 264, 363, and 484. All reported cracks have originated in the rail forward flange at or near the leading edge attach screw holes.