# SDR CALA2023052401616

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 23, 2023
- Submitted: May 26, 2023
- Operation: Air carrier
- Aircraft: [N2140U](https://openairdocs.org/aircraft/N2140U), registered now
- Make and model: Boeing 777-300ER
- Registry model: [Boeing 777-300ER](https://openairdocs.org/model/boeing-777-300er) (OpenAirDocs)
- Aircraft serial: 62651
- Aircraft time: 25,471 hours, 2,822 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: D71701100
- Condition: Failed
- Location: M33143
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2023052401616

## Discrepancy

OFAR EMERGENCY POWER SUPPLY BATTERY (M33143)(MIRROR) FAIL TEST. P/N: D717-01-100, S/N: 432102 OFAR EMERGENCY POWER SUPPLY (M33143) REPLACED AND INSTALLATION T EST CARRIED OUT AS PER AMM 33-51-06-906-802, FOUND SATISFACTORY. P/N ON: D717-01-100, S/N ON: 315620 REFER NR ELE0072, TASK ACCOMPLISHED BY V943538 CORRECTION - OFAR EMERGENCY POWER SUPPLY BATTERY (M33143) REPLAC ED. P/N OFF: D717-01-100, S/N OFF: 432102 P/N ON: D717-01-100, S/N ON: 315620

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