AD 80-21-12 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Great Lakes Aircraft Company, LLC (John Duncan) | 2T-1A-1 | Airworthiness Directives; Great Lakes Models 2T-1A-1 and 2T-1A-2 Series Airplanes |
| aircraft | Great Lakes Aircraft Company, LLC (John Duncan) | 2T-1A-2 | Airworthiness Directives; Great Lakes Models 2T-1A-1 and 2T-1A-2 Series Airplanes |
Unsafe Condition
Engine oil inlet temperatures exceeding acceptable limits due to inadequate cooling airflow.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove and modify cowl face and belly cowl parts per Service Bulletin 11 and install parts kit SPK 101, or install louver plates per Drawing 50105, Sheet 3 of 4, Revision C. Perform engine run-up and inspect for oil leaks.
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
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Affected Aircraft
Great Lakes Models 2T-1A-1 and 2T-1A-2 (Serial Numbers 501 through 828) with Lycoming IO-360 or AEIO-360 engines installed.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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