# SDR AALA202212145920

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 12, 2022
- Submitted: December 14, 2022
- Operation: Air carrier
- Aircraft: [N915AN](https://openairdocs.org/aircraft/N915AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29516
- Aircraft time: 61,813 hours, 25,546 cycles
- System (JASC): [2497 · Electrical Power System Wiring](https://openairdocs.org/jasc/2497)
- Part: Buss Tie
- Part number: 11519681
- Condition: Faulted
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: H
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202212145920

## Discrepancy

AIRCRAFT WAS GROUNDED: CLIMBING THRU FLIGHT LEVEL 340 EXPERIENCED A LOSS OF ELECTRICAL POWER. STARTED APU; PLACED APU ON LEFT TRANSFER BUS. FLIGHT DECLARED AN EMERGENCY AND RETURNED TO CLT LANDING SAFELY. MAINTENANCE REPLACED GENERATOR CONTROL UNITS #1 (AALA202212142024) AND #2 (AALA202212142315) PER AMM 24-21-81. REPLACED BUS TIE BREAKERS #1 (AALA202212145920) AND #2 (AALA202212145445) PER AMM 24-21-41. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECKS PER AMM 24-21-00-700-803.

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