# SDR CALA2026042015495

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 17, 2026
- Submitted: April 20, 2026
- Operation: Air carrier
- Aircraft: [N2142U](https://openairdocs.org/aircraft/N2142U), registered now
- Make and model: Boeing 777-300ER
- Registry model: [Boeing 777-300ER](https://openairdocs.org/model/boeing-777-300er) (OpenAirDocs)
- Aircraft serial: 63722
- Aircraft time: 38,256 hours, 4,230 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: ADD71701100
- 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/CALA2026042015495

## Discrepancy

EMERGENCY LIGHT PACK, M33099, ABOVE DR 2L AFT, FAILED DEEP CYCLE CAPACITY TEST. EMER LIGHT BATTERY PACK (M33099) REPLACED AS PER AMM33-51-06. INSTALLATION TEST PERFORMED IAW AMM33-51-06 SATISFACTORY.

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