# SDR CALA2023031500759

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 15, 2023
- Submitted: March 15, 2023
- Operation: Air carrier
- Aircraft: [N774UA](https://openairdocs.org/aircraft/N774UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26936
- Aircraft time: 98,341 hours, 18,237 cycles
- System (JASC): [3300 · Lighting System](https://openairdocs.org/jasc/3300)
- Part: Battery
- Part number: D71701100
- Part serial: 426728
- Condition: Failed
- Location: L2 M33096
- Stage of operation: IN
- How discovered: O
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2023031500759

## Discrepancy

B777-33-3-7019 DR L2 EMER LT BATTERY M33099 DEEP CYCLE FAIL TRANSFER REF NON - ROUTINE WO.1549668 AND ORIG BY V898181 DR L2 EMER LT BATTERY M33099 REPLACED AND TESTED NORMAL AS PER AMM33-51-06 WORK ACCOMP BY MECH V934240 AND INSP BY V896992 IDT APPROVED BY HX085549

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