# SDR CALA2020120201314

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 1, 2020
- Submitted: December 2, 2020
- Operation: Air carrier
- Aircraft: [N402UA](https://openairdocs.org/aircraft/N402UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 439
- Aircraft time: 83,761 hours, 32,618 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: AD321431
- Condition: Inoperative
- Location: Emergency Lights
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2020120201314

## Discrepancy

EMERGENCY LIGHTS BATTERY PACK (11WL) FAILS TO ILLUMINATE WITH THE SWITCH IN THE ARM POSITION AND THE C/B'S PULLED, PER HAECO LCQ NON ROUTINE.  REMOVED AND REPLACED EMERGENCY LIGHTS BATTERY PACK, IAW A319/320 MM 38-51-38-000-002A 33-51-38-400-002A OPERATIONS TEST OF THE EMERGENCY POWER SUPPLY UNITS CHECKS GOOD, IAW A319/320 MM 33-51-00-710-001 A AND 33-51-00-710-083A.

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