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AD/DHC-2/27 Amdt 3 - Horizontal Stabiliser Front Spar
DHC-2 (Beaver) Series AeroplanesDHC-2 (Beaver) Series Aeroplanes
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DHC-2 (Beaver) Series Aeroplanes
| AD/DHC-2/27 Amdt 3 | Horizontal Stabiliser Front Spar | 7/2007 |
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| Applicability: | All Viking Air Ltd. (formerly Bombardier Inc.) DHC-2 Mk. I, Mk. II and Mk. III aircraft. |
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| Requirement: | 1. Perform the following, in accordance with Viking Air Service Bulletin (SB) 2/47 Revision E, dated 23 January 2007, or later Transport Canada approved revision:a. For all aircraft, remove the tailplane front spar pick-up brackets and carry out a fluorescent penetrant inspection of the tailplane front spar web for cracks in the area of the pick-up brackets in accordance with Appendix A of Viking Air SB 2/47 Revision E, or later Transport Canada approved revision.(i) If cracks are found on aircraft pre-mod 2/758 (aircraft having no gusset plate installed on the rear face of the tailplane front spar), replace the tailplane front spar before further flight.(ii) If cracks are found on the spar web of aircraft with Modification 2/758, replace the spar within 400 flight hours time in service after the crack finding.(iii) Replace previously repaired front spars with stop-drilled cracks as found during the above inspections within 12 months after the effective date of this Directive. Replace spars with cracks that have progressed beyond previously stop-drilled holes before next flight.b. In addition to the Requirement 1.a. fluorescent penetrant inspection, for aircraft without Modification 2/466, visually inspect the front spar web in the area of the lightening holes for cracks between the pick-up brackets. If cracks are found, replace the spar before next flight.2. Incorporate Modifications 2/436, 2/466 and 2/758, unless already accomplished.Report cracks detected during any Requirement 1.a. inspection to Viking Air Limited Technical Support, at technical.support@vikingair.com.Note: Transport Canada AD CF-1991-42R1 refers. |
| Compliance: | 1. Within 200 hours time in service after 5 July 2007, if not previously accomplished in accordance with SB 2/47 Revision D.1.a. Repeat the inspection within 2 years of the last inspection, and thereafter at intervals not to exceed 2 years.2. Within 12 months after the effective date of this Directive. |
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| This Amendment becomes effective on 5 July 2007. |