# SDR DL73K970131

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 22, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N307DL](https://openairdocs.org/aircraft/N307DL), registered now
- Make and model: Boeing 737232
- Aircraft serial: 23079
- System (JASC): [2450 · AC Power Distribution System](https://openairdocs.org/jasc/2450)
- Part: Circuit Breaker
- Condition: Tripped
- Location: Nr 1 Engine
- Component: 91252ZC7C4
- Stage of operation: CR
- Nature of condition: H
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DL73K970131

## Discrepancy

DURING CRUISE, CAPTS INSTRUMENTS YAW DAMPER AND MOST CONTROL AND NAV INST LOSS ELECTRIC POWER.  STANDBY POWER DID NOT RESTORE CAPTS INSTRUMENTS.  APU WOULD NOT START, F/O INSTRUMENTS WORKED.  VOLTS AND FREQS NORMAL BOTH GENERATORS.  REPLACED NR 1 TRANSFER CIRCUIT BREAKER AND POWER RELAY.  FOUND C/B POPPED, POWER AND APU CHECK NORMAL.

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