# SDR CALA2025012101951

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 14, 2025
- Submitted: January 22, 2025
- Operation: Air carrier
- Aircraft: [N495UA](https://openairdocs.org/aircraft/N495UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1842
- Aircraft time: 64,462 hours, 28,339 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Faulted
- 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/CALA2025012101951

## Discrepancy

EPSU INT LOAD EMER L/R FAULT PERFORMED EPSU RESET. FAULT STILL STANDS. FOUND RIGHT HAMD EMERGENCY EXIT LIGHT INOP FOUND LIGHT ELECTRICAL CONNECTOR DISCONNECTED. RECONNECTED IAW AMM 33-51-00. RESET SYSTEM AGAIN. OPS CHECK GOOD. FAULT STILL STANDS. VOLT CHECKED EMERGENCY EXIT SIGN IAW TSM 33-51-00-810-807-A. READ 6 VOLTS, IN LIMITS. NOTE LEFT AND RIGHT EMERGENCY SIGNS ARE LIGHTING IN DIFFERENT COLORS. FOUND LEFT AND RIGHT EXIT SIGNS DIFFERENT PART NUMBERS USING DIFFERENT TECHNOLOGIES. PER AIPC P/N 10-1310-1 CANNOT BE REPLACED BY: F1000550-00 D8095QUALIFIED EXCEPTION.TWO WAY INTERCHANGEABLE AS A SET (LENS & HOUSING) BECAUSE OF DIFFERENT TECHNOLOGIES (BULB & LED). PHOTOS ATTACHED. PERFORMED OPS CK, FAULT CLEARED. REF AMM 33-51-00

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