# SDR CA970521007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 14, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Piper PA-23-250
- Registry model: [Piper PA-23-250](https://openairdocs.org/model/piper-pa-23-250) (OpenAirDocs)
- Engine: Lyc IO540C4B5
- Propeller: Hartzl HCE2YR2
- System (JASC): [7414 · Magneto/Distributor](https://openairdocs.org/jasc/7414)
- Part: Nut
- Condition: Corroded
- Location: Lt Magneto
- Part time: 1,636 hours
- Component: Aero Recip, A182AS11
- Stage of operation: CR
- Nature of condition: R, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA970521007

## Discrepancy

(CAN) IN CRUISE, LEFT ENGINE STARTED TO RUN ROUGH.  AIRCRAFT LANDED.  MAG CHECK CARRIED OUT, 300 RPM DROP WITH LEFT MAG OFF.  NR 4 CYLINDER LEAD DISCONNECTED, RETAINING NUT MISSING ONLY SMALL RING PART FROM NUT FOUND.  INTERGRANULAR CORROSION.  REPLACED.

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