# SDR 95ZZZX6387

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 23, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N185RM](https://openairdocs.org/aircraft/N185RM), registered now
- Make and model: Cessna A185F
- Registry model: [Cessna A185F](https://openairdocs.org/model/cessna-a185f) (OpenAirDocs)
- Aircraft serial: 18502117
- Engine: Cont IO520B
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Crankshaft
- Part number: 649134
- Condition: Failed
- Location: Nr 2 Main
- Part time: 819 hours
- Stage of operation: CR
- Nature of condition: Y
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/95ZZZX6387

## Discrepancy

IN-FLIGHT, CRUISE SETTING, ENGINE RPM DROPPED TO ZERO, PROPELLER ROTATED 2-3 TIMES AFTER RPM GAUGE READ ZERO.  PILOT EXECUTED EMERGENCY LANDING.  UPON ENGINE TEAR-DOWN, FOUND CRANKSHAFT BROKEN AT FORWARD CHEEK OF NR 2 MAIN BEARING JOURNAL.  SUSPECT DEFECT (SCRATCH, NICK) STARTED IN JOURNAL RADIUS WHERE NR 2 CYLINDER CONNECTING ROD CONTACTED RADIUS POINT.  SUBMITTER RECOMMENDS PRECAUTIONS TO BE TAKEN AT ENGINE OVERHAUL TO PRECLUDE EXCESSIVE MOVEMENT OF CONNECTING RODS AGAINST CRANKSHAFT THROWS AT DISASSEMBLY/REASSEMBLY.

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