# SDR 2026F00198

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 9, 2025
- Submitted: September 9, 2026
- Operation: General aviation
- Aircraft: [N4144E](https://openairdocs.org/aircraft/N4144E), registered now
- Make and model: Piper PA-18-150
- Registry model: [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150) (OpenAirDocs)
- Aircraft serial: 187809084
- Aircraft time: 5,720 hours, 2,500 cycles
- Engine: Lyc O360A2A
- Engine time: 5,720 hours, 2,500 cycles
- Propeller: Mcauly 1A200DFA
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: SL36006WA20P
- Part serial: 366W000006027
- Condition: Damaged
- Location: Zone 400
- Part time: 434 hours, 175 cycles
- Stage of operation: UK
- How discovered: B
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026F00198

## Discrepancy

ORIGINAL INSTALL DATE 8-28-2023. NEW CYLINDERS REMOVED AT 434HRS BY MECHANIC DUE TO RING FLUTTER, RING CHATTER, WASHBOARDING. INCONSISTENT METAL WEAR PATTERN ON THE NITRIDE BORE. DISCOVERED BY BORESCOPE AT 100HR INSPECTION. MANUFACTURER REPLACED CYLINDERS WITH NEW. REPLACEMENT CYLINDERS HAD LYCOMING COMPRESSION RINGS INSTEAD OF SUPERIOR. OIL RING WAS STILL SUPERIOR. P/N SL 36006W-A20P, S/N´S 366W00 000 6027, 366W00 000 6029, 366W00 000 6016, 366W00 000 6030.

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