AD 93-01-26
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier Inc. | DHC-8-301 | Airworthiness Directives; De Havilland Model DHC-8-300 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-311 | Airworthiness Directives; De Havilland Model DHC-8-300 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-315 | Airworthiness Directives; De Havilland Model DHC-8-300 Series Airplanes |
Unsafe Condition
Accumulation of fuel vapors in the dry bay area presents a potential risk of an in-flight explosion in the event of a lightning strike.
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Required Actions
Perform external visual inspections of wing dry bay drains for blockage and fuel leaks at specified intervals. Conduct internal visual inspections of the wing dry bay if fuel leaks are detected. Repair drain blockages and perform re-sealing or barrier coating as required. Incorporate flight restrictions in the AFM if leakage is within limits. Accomplish Modification No. 8/1776 within 6 months.
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Compliance Time
Required as indicated, unless accomplished previously.
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Affected Aircraft
Bombardier Inc. Model DHC-8-301, DHC-8-311, DHC-8-315 airplanes with serial numbers 202, 210, 216, 221, 224, 230, 232, 234, 236, 238, 240, 242, 244, 246, 248, 250, 252, 254, 256, 257, 259, 261, 262, 264, 266, 267, 269, 271, 272, 274, 276, 278, 279, 281, 283, 284, 286, 288, and 307.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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