# SDR CALA2021012200072

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 21, 2021
- Submitted: January 22, 2021
- Operation: Air carrier
- Aircraft: [N781UA](https://openairdocs.org/aircraft/N781UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26945
- Aircraft time: 96,170 hours, 16,782 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: D71701100
- Condition: No Test
- Location: Emergency Lights
- 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/CALA2021012200072

## Discrepancy

PERFORM EMERGENCY LIGHT OPERATION CHECK FOUND BATTERY DOOR R3 M3 3404 INOPERABLE.  REPLACED M33404 EMERGENCY LIGHT BATTERY PACK INSTALLATION TEST FOUND NORMAL AT DR R3M, REF AMM 33-51-06 -960-802 REV 90.

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