Engine Oil and Airplane Hour Meter; Pressure Switch Failure
- Published
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators should inspect the oil pressure switch installation for signs of oil seepage, leaks, or damage and replace any suspect switches before further flight. For switches installed on the right crankcase, replacement is recommended within 1,000 hours time-in-service. Additionally, relocating the switch to the left-hand accessory housing per Textron Service Bulletin SEB-79-10 is advised, with subsequent replacements every 3,000 hours as required by AD 2013-11-11.
Summary
The Special Airworthiness Information Bulletin SAIB: CE-19-01 R1 is an FAA advisory addressing the failure of the engine oil pressure switch (part number 83278) on Textron Aviation Inc. Model 172R and 172S airplanes. This bulletin highlights concerns about premature failure of the oil pressure switch, which can lead to oil leaks, obscured pilot vision, and potential engine failure. It provides information to owners, operators, and maintenance personnel to increase awareness and promote preventative measures.
What changed
This revision of SAIB CE-19-01 removes Model 182 and 206 airplanes from the affected list due to fewer ongoing issues and incorporates new service information. It also adds a new recommendation to relocate the oil pressure switch from the crankcase to the accessory housing per Textron Service Bulletin SEB-79-10. The bulletin continues to reference AD 2013-11-11 regarding the 3,000-hour life limit for the pressure switch when installed on the accessory housing.
Why it matters
This bulletin matters because premature failure of the engine oil pressure switch can cause oil leaks that impair pilot visibility and risk engine failure, posing a significant safety hazard. Operators and maintenance teams need to be vigilant in inspecting and replacing these switches to prevent in-flight emergencies. Understanding the recommended relocation and replacement intervals helps ensure continued airworthiness and compliance with FAA guidance.
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