# SDR 2007FA0000734

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 24, 2006
- Submitted: August 28, 2007
- Operation: General aviation
- Aircraft: [N999JW](https://openairdocs.org/aircraft/N999JW), registered now
- Make and model: Mooney M20R
- Registry model: [Mooney M20R](https://openairdocs.org/model/mooney-m20r) (OpenAirDocs)
- Aircraft serial: 290293
- Engine: Cont IO550*
- System (JASC): [2424 · AC Regulator](https://openairdocs.org/jasc/2424)
- Part: Volt Regulator
- Part number: 800397501
- Part serial: 0162
- Condition: Failed
- Part time: 296 hours
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2007FA0000734

## Discrepancy

THE INABILITY OF THE VOLTAGE REGULATOR (PN 800397-501, SN 0165) TO CONTROLTHE OUTPUT OF THE ALTERNATOR WHEN THE BATTERY SWITCH WAS TOGGLED BETWEEN THE NR1 AND NR 2 BATTERY, IN FLIGHT.  (K)

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