# SDR CA991208071

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 22, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Make and model: Piper PA-31-350
- Registry model: [Piper PA-31-350](https://openairdocs.org/model/piper-pa-31-350) (OpenAirDocs)
- Engine: Lyc TIO540J2BD
- Propeller: Hartzl HCE3YR2
- System (JASC): [2460 · DC Power Distribution System](https://openairdocs.org/jasc/2460)
- Part: Master Switch
- Part number: 587886
- Condition: Failed
- Location: Cockpit
- Stage of operation: NR
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA991208071

## Discrepancy

(CAN) MASTER SWITCH TURNS ON BY ITSELF USUALLY AT NIGHT AND HIGH MOISTURE.  SITUATION CAUSING DEAD BATTERIES.  THIS HAS BEEN RECURRING ON SEVERAL DIFFERENT A/C OVER THE PAST 8 YEARS.  SUBMITTER STATED COMPANY POLICY IS TO REPLACE WITH A NEW SWITCH EACH TIME, BUT THIS HAS NOT SOLVED THE PROBLEM.

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