AD 2010-19-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Model DHC-8-200 and DHC-8-300 Series Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Bombardier, Inc. Model DHC-8-200 and DHC-8-300 Series Airplanes |
Unsafe Condition
All three flapper valves located in each collector tank do not conform to design requirements due to the installation of a valve spring on the flapper hinge pin, which should have been removed prior to installation. This valve spring holds the flapper valve closed, preventing gravity feed and potentially leading to an in-flight engine shutdown in the event of scavenge system failure.
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Required Actions
Perform a detailed inspection of each collector tank flapper valve for the presence of a valve spring. If the valve spring is present, remove it and apply an identification mark. If the valve spring is not present, apply an identification mark. All actions must be completed before further flight.
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Compliance Time
Within 1,000 flight hours after the effective date of this AD.
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Affected Aircraft
Bombardier, Inc. Model DHC-8-201, -202, -301, -311, and -315 airplanes, certificated in any category, having serial numbers 644 through 664 inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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