# SDR ASMF200406030

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 26, 2004
- Submitted: June 30, 2004
- Operation: Air carrier
- Aircraft: N583MD
- Make and model: Doug DC-9-83
- Registry model: [Doug DC-9-83](https://openairdocs.org/model/douglas-dc-9-83) (OpenAirDocs)
- Aircraft serial: 49659
- Aircraft time: 37,103 hours, 2,876 cycles
- Engine: Pwa JT8D1
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Selector Switch
- Condition: Failed
- Location: Generator
- Stage of operation: TX
- How discovered: O
- Nature of condition: H
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASMF200406030

## Discrepancy

AIRCRAFT RETURNED TO PLATFORM, APU OUT OF SERVICE AND ENGINE GENERATORS WITHOUT INDICATION OF VOLTAGE AND FREQUENCY. CIRCUIT BREAKERS B1-204, B1-205 AND B1-206 WERE CHECKED AND SWITCH SELECTOR S1-99 WAS REPLACED IAW MM 24-21-01, TEST CORRECT.

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