AD 80-07-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | R172K | Airworthiness Directives; Cessna Model R172K Airplanes |
Unsafe Condition
Failure of the engine oil pressure pump drive shaft and resulting oil pressure loss caused by an improperly installed tachometer shaft connector.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the tachometer drive connector torque, retorque within 280-300 inch-pounds if within 200-350 inch-pounds breakaway torque. If torque is outside this range, replace the oil pump drive gear and Woodruff key or perform magnetic particle inspection, then reinstall components and record compliance.
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Compliance Time
within the next 10 hours' time-in-service after the effective date of this AD
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Affected Aircraft
Cessna Model R172K airplanes with serial numbers R1722000 through R1723204, R1723206 through R1723211, R1723213, R1723214, R1723216 through R1723220, R1723222 through R1723226, R1723228 through R1723238, R1723240 through R1723246, R1723248 through R1723258, R1723260 through R1723272, R1723274 through R1723312, R1723314, R1723316 through R1723319, R1723321 through R1723329, R1723331 through R1723351, R1723353 through R1723362.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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