# SDR USAASB01325

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 24, 2001
- Submitted: December 18, 2001
- Operation: Air carrier
- Aircraft: N428US
- Make and model: Boeing 737-4B7
- Registry model: [Boeing 737-4B7](https://openairdocs.org/model/boeing-737-4b7) (OpenAirDocs)
- Aircraft serial: 24550
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Charger
- Part number: 20121
- Condition: Failed
- Location: Cabin
- 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/USAASB01325

## Discrepancy

CLE - MAINTENANCE FOUND THE AFT LEFT EXTERIOR OVERWING EMERGENCY LIGHT, THE RIGHT INTERIOR OVERWING CEILING EMERGENCY LIGHT, THE FORWARD SEAT EXIT AND LOW LEVEL EXIT SIGNS AND THE EMERGENCY EXIT LIGHT ON SEAT ROW 2 INOPERATIVE.  MAINTENANCE REMOVED AND REPLACED THE M1479 BATTERY PACK (P/N 2013-1A) AND CHARGER ASSEMBLY AND RECONNECTED PLUG AT SEAT ROW 2.  OPS CHECK OF EMERGENCY LIGHT GOOD.  (M)

---
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.