# SDR 2023FA0000613

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 19, 2023
- Submitted: October 19, 2023
- Operation: General aviation
- Aircraft: [N9643Q](https://openairdocs.org/aircraft/N9643Q), registered now
- Make and model: Cessna 172M
- Registry model: [Cessna 172M](https://openairdocs.org/model/cessna-172m) (OpenAirDocs)
- Aircraft serial: 17265727
- Aircraft time: 13,897 hours
- Engine: Lyc O320D2J
- Engine time: 4,244 hours
- Propeller: Mcauly 1C160DTM
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Rocker
- Part number: 15F288351017F193
- Part serial: NA
- Condition: Damaged
- Location: Valve Train
- Part time: 99 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2023FA0000613

## Discrepancy

LYCOMING FACTORY OVERHAULED O-320-D2J, S/N L-17060-39E. DURING ROUTINE MX, SB388C (EXHAUST VALVE GUIDE INSP.) FOUND 4EA PUSH RODS P/N 15F28835-10, 2EA PUSH RODS P/N 15F28835-09, 6EA ROCKER ARMS P/N17F19357, 6EA SOCKETS P/N 15B21319 & 6EA LIFTERS P/N 15B26066 TO HAVE MECHANICAL DAMAGE (HEAVY SCUFF -SCORING)

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