AD 81-22-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-6-1 | Airworthiness Directives; DeHavilland Model DHC-6 Series Airplanes |
| aircraft | Viking Air Limited | DHC-6-100 | Airworthiness Directives; DeHavilland Model DHC-6 Series Airplanes |
| aircraft | Viking Air Limited | DHC-6-200 | Airworthiness Directives; DeHavilland Model DHC-6 Series Airplanes |
| aircraft | Viking Air Limited | DHC-6-300 | Airworthiness Directives; DeHavilland Model DHC-6 Series Airplanes |
Unsafe Condition
Failure of the elevator torque tube hinge arm attachment bolt, P/N AN175-27A, due to cracks.
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Required Actions
Inspect the elevator torque tube hinge arm attachment bolt for cracks in accordance with DeHavilland Service Bulletin 6/406 or approved equivalent. Replace damaged bolts with new P/N AN175-27 if cracking is found and report to the FAA as specified.
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Compliance Time
Within the next 200 hours in service after the effective date of this airworthiness directive, for aircraft with 5000 hours or five years in service, whichever occurs first.
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Affected Aircraft
DeHavilland Model DHC-6-1, DHC-6-100, DHC-6-200, DHC-6-300 aircraft certificated in all categories.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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