AD 2006-12-15
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | DHC-8-400 | Airworthiness Directives; Bombardier Model DHC-8-400 Series Airplanes |
Unsafe Condition
Reports of cracks of the fuel access panels, which could lead to arcing and ignition of fuel vapor during a lightning strike, and result in fuel tank explosions and consequent loss of the airplane.
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Required Actions
Within 400 flight hours after the effective date, perform an ultrasonic inspection for cracks of the first fuel access panel, part number 85714230-001, outboard of the nacelle on the left- and right-hand wings. Repeat the inspection at intervals not to exceed 1,200 flight hours. Within 6,000 flight hours after the initial inspection, replace any access panel P/N 85714230-001 with a new panel P/N 85714230-003 or P/N 85714230-005.
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Compliance Time
Within 400 flight hours after the effective date for initial inspection, and thereafter at intervals not to exceed 1,200 flight hours. Replacement must occur within 6,000 flight hours after the initial inspection.
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Affected Aircraft
Bombardier Model DHC-8-400, DHC-8-401, and DHC-8-402 airplanes, certificated in any category; serial numbers 4001, and 4003 through 4106 inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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