AD 2004-25-22
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lake | Various | Airworthiness Directives; Great Lakes Aircraft Company, LLC, Models 2T-1A-1 and 2T-1A-2 Airplanes |
| engine | Lycoming | IO-360-B1F6 or AIO-360-B1G6 | Airworthiness Directives; Great Lakes Aircraft Company, LLC, Models 2T-1A-1 and 2T-1A-2 Airplanes |
Unsafe Condition
Heat distortion, damage, and cracks in the alternate air door could cause pieces to break off and get sucked into the induction system, blocking the airflow to the engine. Additionally, the absence of an induction system drain could lead to blockage or restriction of the induction system, potentially causing engine failure.
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Required Actions
Visually inspect the aircraft induction system drain fitting for blockage or restriction, and clear or drill a hole if necessary. Visually inspect the alternate air door for damage and repair or replace any damaged components. Visually inspect the entire induction system, including the filter, for cleanliness, security, and damage, and repair or replace any dirty or damaged components.
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Compliance Time
Before further flight
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Affected Aircraft
Great Lakes Aircraft Company, LLC, Models 2T-1A-1 and 2T-1A-2 airplanes with a Lycoming IO-360-B1F6, AIO-360-B1G6, or AEIO-360-B1G6 engine installed.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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