# SDR 2010FA0000598

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 15, 2010
- Submitted: June 18, 2010
- Operation: General aviation
- Aircraft: [N1036J](https://openairdocs.org/aircraft/N1036J), registered now
- Make and model: Gulstm 112
- Aircraft serial: 36
- Engine: Lyc IO360C1D6
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Camshaft
- Part number: AEL18840
- Condition: Broken
- Location: Engine
- Part time: 236 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/2010FA0000598

## Discrepancy

PILOT STATED THE ENGINE BECAME ROUGH AFTER TAKEOFF. RETURNED TO AIRPORT & LANDED. FOUND NR 1 CYLINDER TO BE COLDER THAN REST. PULLED ROCKER COVER & NOTED THE VALVES WERE NOT MOVING WHEN ROTATING ENGINE. PULLED ROCKER ARMS & PUSHRODS BUT FOUND NO PROBLEMS. REMOVED ENGINE FROM ACFT & BROUGHT TO REPAIR STATION. REMOVED A CYLINDER & FOUND CAMSHAFT BROKEN. DISASSEMBLED REMAINDER OF ENGINE. VALVES MOVED FREELY IN GUIDES & NO OTHER UNUSUAL PROBLEMS NOTED WITH ENGINE. CAMSHAFT INSTALLED NEW 236.48 HOURS PREVIOUSLY WITH NEW 72877 LIFTERS. CAMSHAFT IS BROKEN ABOUT 3 3/4" FROM FORWARD END. THE FRACTURE APPEARS TO ORIGINATE AT THE BASE OF LETTERS E AND L OF THE METAL STAMPED PART NUMBER, FORWARD OF THE NR 1 & 2 INTAKE LOBE. RECOMMEND THAT THE PART NUMBER BE APPLIED TO THE PART BY A METHOD OTHER THAN METAL STAMPING.

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