# SDR CA050511002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 21, 2005
- Submitted: June 2, 2005
- Operation: General aviation
- Make and model: Cessna 172M
- Registry model: [Cessna 172M](https://openairdocs.org/model/cessna-172m) (OpenAirDocs)
- Aircraft time: 16,747 hours
- Engine: Lyc O360A4M
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Lifter
- Part number: 72877
- Condition: Destroyed
- Location: Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA050511002

## Discrepancy

A/C SUFFERED A PWR LOSS IN FLT DUE TO THE COLLAPSE/FRACTURE OF NR 2 CYLINDER EXHAUST VALVE HYD LIFTER BODY P/N 72877.  THE PILOT WAS ABLE TO MAINTAIN CONTROL OF THE A/C AND CONTINUE THE FLT TO THE CLOSEST AIRPORT (SWAN HILLS, ALBERTA 'CEM5').  LANDED W/O FURTHER INCIDENT.  INSPECTION REVEALED INTERNAL DAMAGE TO THE ENGINE RESULTING FROM THE BREAK-UP OF THE VALVE LIFTER BODY, AND PIECES OF IT BEING PROJECTED AGAINST THE CRANKCASE, AS A RESULT. THE ENG IS A TOTAL WRITE OFF THE ENGINE WAS CHANGED AND THE A/C WAS RETURNED TO SERVICE. THIS ENGINE OPERATED ON A TRANSPORT CANADA APPROVED 'ON CONDITION' MX PROGRAM.  FLIGHT TECH AVIATION AS THE MX ARM OF ALTA FLIGHTS (CHARTERS) INC HAVE DECIDED TO REDUCE THIS ENG MAKE/M

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