# SDR CALA2026092819902

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 26, 2026
- Submitted: September 28, 2026
- Operation: Air carrier
- Aircraft: [N773UA](https://openairdocs.org/aircraft/N773UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26929
- Aircraft time: 111,642 hours, 21,342 cycles
- Engine: Pwa PW4077
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: ADD71701100
- Condition: No Test
- Location: Zone 200
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026092819902

## Discrepancy

POWER SUPPLY,  BATTERY PACK CAPACITY CHECK PROCEDURE.  ALL LIGHTS ASSOCIATED WITH POWER SUPPLY M33094 EXTINGUISH AFTER APPROXIMATELY 3 MINUTES.  REPLACED THE BATTERY PACK IAW AMM. 33-51-06-960-802, OP CHKD OK.

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