# SDR CA070312009

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 20, 2007
- Submitted: January 21, 2008
- Operation: General aviation
- Make and model: Piper PA-31-350
- Registry model: [Piper PA-31-350](https://openairdocs.org/model/piper-pa-31-350) (OpenAirDocs)
- Aircraft time: 17,380 hours
- Engine: Lyc TIO540J2BD
- Propeller: Hartzl HCE3YR2A
- System (JASC): [2420 · AC Generation System](https://openairdocs.org/jasc/2420)
- Part: Alternator
- Part number: 587857
- Condition: Failed
- Location: Left
- Stage of operation: CR
- How discovered: O
- Nature of condition: H, P
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA070312009

## Discrepancy

(CAN) LT ALTERNATOR FAILED AT CRUISE, FAULT-FIELD POWER FUSE BLOWER.  RT ALTERNATOR FAILED/NOT ON LINE, FAULT, BAD ALTERNATOR MASTER SWITCH OR NOT ON.  RT INOP ALTERNATOR SWITCH/RELAY FAILED SO NO COCKPIT INOP LIGHT.  AC CONTINUED FLIGHT ON BATTERY POWER TO DESTINATION.  FLIGHT AT NIGHT -30C AND IFR CONDITIONS.  CONCLUSIONS/RECTIFICATIONS:  LT FIELD FUSE REPLACED. RT ALTERNATOR INOP SWITCH REPLACED. ALTERNATOR MASTER SWITCH CLEANED/TESTED.  BATTERY CHARGED AND TESTED.  AC AND ALTERNATOR SYS OPS CHECKED AND AC RETURNED TO SERVICE. (TC NR 20070312009)

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