# SDR 2012FA0000565

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 13, 2012
- Submitted: August 13, 2012
- Operation: General aviation
- Aircraft: N57AF
- Make and model: Cessna 172RG
- Registry model: [Cessna 172RG](https://openairdocs.org/model/cessna-172rg) (OpenAirDocs)
- Aircraft serial: 17281046
- Aircraft time: 9,812 hours
- Engine: Lyc O360F1A6
- System (JASC): [2400 · Electrical Power System](https://openairdocs.org/jasc/2400)
- Part: Alternator
- Part number: 991059111
- Part serial: HL040926
- Condition: Defective
- Part time: 1,000 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2012FA0000565

## Discrepancy

PILOT REPORTED LOW VOLTAGE OF 22 VOLTS AND PERFORMED AN EMERGENCY LANDING.  GROUND CHECK OF ALTERNATOR IDENTIFIED IT DEFECTIVE.  ALTERNATOR WAS REPLACED.

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