# SDR 2006FA0000053

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 7, 2006
- Submitted: January 19, 2006
- Operation: General aviation
- Aircraft: [N9234N](https://openairdocs.org/aircraft/N9234N), registered now
- Make and model: Maule M-7-235
- Registry model: [Maule M-7-235](https://openairdocs.org/model/maule-m-7-235) (OpenAirDocs)
- Aircraft serial: 4119C
- Engine: Lyc IO540W1A5
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Piston
- Part number: LW13923
- Condition: Broken
- Location: Engine
- Part time: 1,078 hours
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2006FA0000053

## Discrepancy

INSPECTION OF THE OIL FILTER DURING ROUTINE OIL CHANGE FOUND 2 EA (.1250 INCH) DIAMETER PIECES OF ALUMINUM.  FURTHER DISASSEMBLY OF THE ENGINE/ CYLINDERS FOUND THE NR 1 CYLINDER PISTON SKIRT WAS MISSING A SECTION (.5 INCH X 1.1250 INCH LONG).  PERFORMED A DY PENETRANT INSP TO THE OTHER PISTONS.  3 WERE CRACKED AT THE SAME LOCATION.  1 HAD INDICATION OF POSSIBLE CRACK AND 1 WAS IN SERVICEABLE CONDITION.  NO OTHER DAMAGE TO THE PISTON WAS DIAMETER WAS WITHIN SERVICE LIMITS.  CYLINDER DIAMETER WAS WITHIN SERVICE LIMITS.  (K)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.