# SDR CALA2021112902190

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 28, 2021
- Submitted: November 29, 2021
- Operation: Air carrier
- Aircraft: [N788UA](https://openairdocs.org/aircraft/N788UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26942
- Aircraft time: 100,326 hours, 13,292 cycles
- System (JASC): [3300 · Lighting System](https://openairdocs.org/jasc/3300)
- Part: Battery
- Part number: 13717233
- Part serial: 318416
- Condition: Failed
- Location: Dr 4l, M33407
- 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/CALA2021112902190

## Discrepancy

DR 4L M33407 EMER LT BATTERY CAPACITY CHECK FAIL TRANSFER REF. HX NON-ROUTINE LP 9131063 AND ORIGINATED BY EMP NO V898181 DR 4L M33407 EMER LIGHT BATT PACK REPLACED AND TESTED NORMAL AS PER AMM 33-51-06. WORK ACCOMPLISHED BY MECHANIC V898181 INSPECTED BY V896958 ADD EMP:V898181 RII INSP IS OK APPROVED BY HX 085549

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