# SDR CALA2024120203003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 2, 2024
- Submitted: December 2, 2024
- Operation: Air carrier
- Aircraft: [N780UA](https://openairdocs.org/aircraft/N780UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26944
- Aircraft time: 101,365 hours, 18,343 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71702001
- 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/CALA2024120203003

## Discrepancy

DR 4R M33408 EMER LIGHT POWER SUPPLY TEST FAIL TRANSFER REF. NON-ROUTINE HX NRC WO.4095953 DR 4R M33404 EMER LIGHT POWER SUPPLY REPLACED AND TESTED NORMAL IAW AMM 33-51-06

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