# SDR 97ZZZM770

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 16, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N519AU
- Make and model: Boeing 737-3B7
- Registry model: [Boeing 737-3B7](https://openairdocs.org/model/boeing-737-3b7) (OpenAirDocs)
- Aircraft serial: 23705
- System (JASC): [2430 · DC Generating System](https://openairdocs.org/jasc/2430)
- Part: Transfer Relay
- Part number: 91252ZC7C4001
- Condition: Failed
- Location: E/E Compt
- Stage of operation: CR
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZM770

## Discrepancy

MBJ - FL 1888 - FLIGHT RETURNED TO FIELD AT MBJ DUE TO SMOKE IN THE CABIN.  CREW FOUND THE NR 2 TRANSFORMER RECTIFIER HAD FAILED AND THE CIRCUIT BREAKER WAS POPPED.  FLIGHT LANDED WITHOUT FURTHER INCIDENT.  NO EMERGENCY WAS DECLARED.  MAINTENANCE REMOVED AND REPLACED THE NR 2 TRANSFORMER RECTIFIER UNIT AND THE R4 TRANSFER RELAY.  OPS CHECK GOOD.  REFERENCE USAASB97199.

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