The NTSB has issued a safety recommendation on the F&M series of oil filter adapters used on a range of piston aircraft engines. Pilots and owners of aircraft using the adapters should be aware of the report and take action as needed. The oil filter adapter allows the use of a spin-on oil filter—rather than the manufacturer’s brass oil screen—on Continental engines found in popular singles and twins, such as certain Beechcraft Bonanzas, Barons, and Debonairs; Cessna singles and the 310, Maules, the Mooney M20K, and Piper Arrows and Seneca IIs.
NTSB Issues Safety Recommendation on F&M Oil Filter Adapters
Key Takeaways:
- The NTSB has issued a safety recommendation regarding F&M series oil filter adapters, linking them to oil starvation accidents caused by improper gasket sealing and inadequate torque during installation.
- Stratus Tool Technologies, the current manufacturer, previously released a mandatory service bulletin (SB-001 Rev-O) for these adapters, which the NTSB now emphasizes as critical for all operators to follow due to significant contributions from inadequate installation and maintenance.
- Aircraft owners and pilots utilizing any F&M or related oil filter adapters are strongly urged to review the service bulletin and undertake necessary inspections and procedures to prevent potential catastrophic engine failure.
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