# SDR SWAA2024020850286

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 31, 2024
- Submitted: February 8, 2024
- Operation: Air carrier
- Aircraft: [N452WN](https://openairdocs.org/aircraft/N452WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29846
- Aircraft time: 65,652 hours, 39,325 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Charger
- Part number: UNKNOWN
- 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/SWAA2024020850286

## Discrepancy

MULTIPLE EMERGENCY LIGHTS IN PAX CABIN INOP<[01] REMOVED AND REPLACED EMERGENCY BATTERY PACKS AT POSITIONS M1672; M1674 AND M1675 AS PER REF B-737; AMM 33-51-06-960-805. OPERATIONAL TEST FOUND NORMAL.;[02] VERIFIED STEP 1.;[03] PERFORMED CONTINUITY CHECKS BETWEEN BATTERY PACK M1670 CONNECTOR D10716 PINS 3;4 BATTERY PACK M1673 CONNECTOR D10746 PINS 3;4 BATTERY PACK M1668 CONNECTOR D10712 PINS 3;4 UP TO DISCONNECT BRACKET AB0340A CONNECTOR D40196J PINS 1;2 FOUND NORMAL PER WDM 33-51-11 SHEET 2 FURTHER T/S REQUIRED;[04] CORRECTION TO STEP 3<BR>PERFORMED CONTINUITY CHECKS BETWEEN BATTERY PACK M1670 CONNECTOR D10716 PINS 3;4 BATTERY PACK M1673 CONNECTOR D10746 PINS 3;4 BATTERY PACK M1668 CONNECTOR D10712 PINS 3;4 UP TO DISCONNECT BRACKET AB0340A CONNECTOR D40196J PINS 1;2 FOUND NORMAL PER WDM 33-51-11 SHEET 2 FURTHER T/S REQUIRED<BR>TOOL: MULTIMETER<BR>B/C 176391<BR>CAL DUE 13 OCT 24;[05] VERIFIED STEP 4.;[06] REMOVED AND REPLACED EMERGENCY LIGHT BATTERY PACK M1674/M1675 & BATTERY POWER SUPPLY M1670 & M1675 I/A/W BOEING AMM 33-51-06-960-805 & 33-51-06-960-806. OPERATIONAL TEST PERFORMED I/A/W BOEING AMM 33-51-00-710-801; OPS CHECK NORMAL;[07] VERIFIED STEP 6

---
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.