Bombardier (Boeing Canada/De Havilland)
Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes
Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes
| AD/DHC-8/145 | Wing Fuel Tank Skin betweenYw171 and Yw 261 | 4/2009 |
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| Applicability: | DHC-8 aircraft, Models 102, 103, 106, 201, and 202, with serial numbers 003 through 663. |
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| Requirement: | Action in accordance with the requirements of Transport Canada AD CF-2009-05.Note: Bombardier Service Bulletin 8-57-46 original issue, or later Transport Canada approved revision, refers. |
| Compliance: | As specified in the Requirement document, with a revised effective date of9 April 2009. |
| This Airworthiness Directive becomes effective on 9 April 2009. | |
| Background: | During a puncture voltage test of the aluminium-loaded paint on an in-service DHC-8 aircraft, conducted to validate an SFAR 88 related task, the manufacturer discovered that the top wing fuel tank skin between Yw171.20 and Yw261.00 was painted with a non-aluminised enamel coating due to a misinterpretation of the painting instructions in the Structural Repair Manual. With this type of paint application, it is possible that, in the worst case scenario, a lightning strike could puncture the wing skin and create an ignition source in the fuel tank. This Directive requires certain actions to ensure that the correct paint type is applied to the affected wing skin. |
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David Villiers
Delegate of the Civil Aviation Safety Authority
24 February 2009