AD 91-05-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-7-1 | Airworthiness Directives; Boeing Of Canada, Ltd., De Havilland Division Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-100 | Airworthiness Directives; Boeing Of Canada, Ltd., De Havilland Division Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-101 | Airworthiness Directives; Boeing Of Canada, Ltd., De Havilland Division Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-102 | Airworthiness Directives; Boeing Of Canada, Ltd., De Havilland Division Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-103 | Airworthiness Directives; Boeing Of Canada, Ltd., De Havilland Division Model DHC-7 Series Airplanes |
Unsafe Condition
Possible malfunction of the wing flight spoilers due to outboard and inboard spigot fittings (Modification Nos. 7/1927, 7/1951, 7/1928, 7/1952).
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the outboard and inboard right and left wing flight spoilers spigot fittings within 180 days after the effective date, following Service Bulletins 7-27-25/Rev B and 7-27-26/Rev B. Alternate compliance may be approved by the Manager, New York ACO.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 180 days after the effective date of this AD
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Affected Aircraft
de Havilland Model DHC-7 series airplanes, Serial Numbers 3 through 36, inclusive
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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