AD 87-02-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-7-1 | Airworthiness Directives; DeHavilland Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-100 | Airworthiness Directives; DeHavilland Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-101 | Airworthiness Directives; DeHavilland Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-102 | Airworthiness Directives; DeHavilland Model DHC-7 Series Airplanes |
| aircraft | Viking Air Limited | DHC-7-103 | Airworthiness Directives; DeHavilland Model DHC-7 Series Airplanes |
Unsafe Condition
Fuel fire in the wing landing light bay due to fuel leakage from the external wing skin exposed after removing the canoe fairings of the left and right No. 4 flap track.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 50 hours time-in-service after the effective date, remove the canoe fairings of the left and right No. 4 flap track and conduct a visual inspection per Service Bulletin 7-28-18. If fuel leakage evidence is found, perform an internal inspection, repair, and pressure test of the fuel tank. Within 200 hours time-in-service, install Modification 7/2518 per the same service bulletin.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 50 hours time-in-service after the effective date of this AD and within 200 hours time-in-service after the effective date of this AD
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Affected Aircraft
De Havilland Model DHC-7 series airplanes, certificated in any category
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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