AD 2008-11-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking | Air Limited Model DHC-2 | Airworthiness Directives; Viking Air Limited Model DHC-2 Series Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Viking Air Limited Model DHC-2 Series Airplanes |
Unsafe Condition
Cracks have been reported in the front spar center web of the tailplane at the pick-up bracket and at lightening holes. If not detected early and repaired, these cracks may lead to failure of the tailplane.
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Required Actions
Replace the tailplane front spar for airplanes with previously repaired cracks using stop-drilled holes. Visually inspect the front spar web in the area of lightening holes for cracks between the pick-up brackets for airplanes with lightening holes. Incorporate Modification 2/466 (installation of tailplane front spar without lightening holes) depending on inspection results. Install longer pick-up brackets (modification 2/436) for airplanes with serial numbers 1 through 100. Install a gusset plate on the rear face at each pick-up bracket (modification 2/758) for airplanes with serial numbers 1 through 317.
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Compliance Time
Within 12 calendar months, 200 hours time-in-service, or 24 calendar months after December 15, 1992, depending on the specific action required.
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Affected Aircraft
Viking Air Limited Model DHC-2 Series Airplanes, including Models DHC-2 Mk. I, DHC-2 Mk. II, and DHC-2 Mk. III, all serial numbers, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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