# SDR 2026FA0000138

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 16, 2026
- Submitted: February 24, 2026
- Operation: General aviation
- Aircraft: [N6862F](https://openairdocs.org/aircraft/N6862F), registered now
- Make and model: Cessna 150
- Registry model: [Cessna 150](https://openairdocs.org/model/cessna-150) (OpenAirDocs)
- Aircraft serial: 15063462
- Aircraft time: 5,870 hours
- Engine: Cont O200A
- Engine time: 2,048 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Retainer
- Part number: SA625961H
- Condition: Broken
- Location: Cylinder
- Part time: 36 hours
- Component: Cylinder, Superior
- Component part number: SA10200A20P
- Stage of operation: CR
- How discovered: O
- Nature of condition: E, R, Y
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026FA0000138

## Discrepancy

ON 1/16/26 AT APPROX 2030Z 2NM NE OF THE LAKE MURRAY DAM, ON A FLT FROM KCUB - KEOE AT 2000' MSL,  ENGINE BEGAN EXPERIENCING SEVERE VIBRATION & RPM LOSS. ENG BEGAN SPUTTERING & SHUT OFF. MIXTURE WAS FULLY ENRICHED & THROTTLE MOVED TO THE FULL POSITION, ENG THEN BEGAN TO SPUTTER AGAIN & ABLE TO MAINTAIN 1500 RPM.  THE SAME CYCLE REPEATED. ACFT WAS ABLE TO MAKE AN EMER LANDING AT KCAE. ON DISASSEMBLY & INSP OF ENG, FOUND CYLINDER 2 EXHAUST VALVE SPRING RETAINER BROKEN IN HALF ALLOWING EXHAUST VALVE TO DROP INTO CYLINDER 2 CAUSING CATASTROPHIC ENG DAMAGE.  CYLINDER WAS A RELATIVELY NEW CYLINDER ASSY HAD APPROX 37 HOURS ON IT SINCE NEW.

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