# SDR SWAA2021042665875

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 22, 2021
- Submitted: April 26, 2021
- Operation: Air carrier
- Aircraft: N781WN
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 30601
- Aircraft time: 70,304 hours, 41,540 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Condition: No Test
- Location: Emergency Lights
- 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/SWAA2021042665875

## Discrepancy

BATTERY PACKS POWER SUPPLIES FAILED CAPACITY TEST AT FOLLOWING LOCATIONS M1673;M1672;M1675 M1674. R AND R 'D BATTERY PACKS POWER SUPPLIES AT FOLLOWING LOCATIONS M1673;M1672;M1675; M1674 PER AMM335106

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.