# SDR BJF2007F00000

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 10, 2007
- Submitted: October 2, 2007
- Operation: Air carrier
- Aircraft: N269LP
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S8206
- Engine: Lyc IO360L2A
- Propeller: Mcauly 1A170*
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 4SL36006WA20P
- Part serial: 366WF034193
- Condition: Cracked
- Location: Nr 3
- Part time: 1,346 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/BJF2007F00000

## Discrepancy

AIRCRAFT EXPERIENCED PARTIAL POWER LOSS.  LANDED WITHOUT INCIDENT.  INSPECTED ENGINE NOTED HOLE, NR 3 SPARK PLUG WITH A LARGE CRACK EXTENDING DOWN TO EXHAUST PORT FLANGE.  FURTHER INSPECTION ALSO FOUND NR 1 CYLINDER CRACKED AT SAME LOCATION BUT HAD NOT YET HAD COMPLETE FAILURE.  POSSIBLE CAUSE MAY BE IMPROPER LEANING PROCEDURES.  NOT: AIRCRAFT USED EXTENSIVELY FOR FLIGHT TRAINING.  (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.