AD 2006-12-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking | Air Limited Model DHC-7 | Airworthiness Directives; Viking Air Limited Model DHC-7 Airplanes |
Unsafe Condition
The designed life limit for the primary structure for the affected airplanes is 80,000 total flight cycles. Continued operation beyond this limit could result in reduced structural integrity of the airplane.
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Required Actions
Revise the FAA-approved Airworthiness Limitations section of the airplane maintenance manual to prohibit operation of the airplane past its designed life limit for the primary structure, which is 80,000 total flight cycles. Contact the FAA for approval of analysis that substantiates the airplane is safe to continue operation beyond the designed life limit.
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Compliance Time
Within 12 months of effective date
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Affected Aircraft
Viking Air Limited Model DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102, and DHC-7-103 airplanes, certificated in any category; except airplanes having serial numbers 3 through 10 inclusive, 12 through 14 inclusive, and 16 through 27 inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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