# SDR CALA2026092319726

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 20, 2026
- Submitted: September 23, 2026
- Operation: Air carrier
- Aircraft: [N210UA](https://openairdocs.org/aircraft/N210UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30216
- Aircraft time: 87,104 hours, 18,681 cycles
- Engine: Pwa PW4077
- 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/CALA2026092319726

## Discrepancy

DURING EMERGENCY LIGHTS, OPS TEST WITH THE TEST SWITCHES,  ALL EMERGENCY LIGHTS SUPPLIED BY POWER SUPPLY M33404 FAILED AFTER APPROXIMATELY 2 MINUTES OF OPS.  SUSPECT BATTERY PACK AT M33404 OVER 3R DOOR. REPLACED THE POWER SUPPLY CHARGER ASSY IAW AMM 33-51-06-960-803 AND PERFORMED POWER SUPPLY, BATTERY PACK DEEP-CYCLE PROCEDURE IAW TASK 33-51-06-600-801, CONDITION SAME,  REPLACED POWER SUPPY ASSY IAW AMM 33-51-06-960-803, TESTED OK.

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