# SDR SWAA2022041393734

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 9, 2022
- Submitted: April 13, 2022
- Operation: Air carrier
- Aircraft: [N8641B](https://openairdocs.org/aircraft/N8641B), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 60085
- Aircraft time: 26,510 hours, 12,140 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Light
- Part number: M2816
- Condition: Inoperative
- 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/SWAA2022041393734

## Discrepancy

EMERGENCY EXITS LIGHTS NOT STAYING ILLUMINATED @ FWD SERVICE DOOR; RH MID CABIN TO AFT CABIN AISLE; RH OVERWING EXIT AND AFT SERVICE DOOR . / [01] TROUBLESHOT DOWN TO POWER SUPPLIES M2816; M1670 & M1672. KNOWN GOOD BATTERIES WERE INSTALLED AT THESE LOCATIONS AND ONCE THEY LOST CHARGE THE POWER SUPPLY DID NOT RECHARGE THEM. THE LIGHTS WOULD THEN ONLY COME ON MOMENTARILY.;[02] TROUBLESHOT DOWN TO POWER SUPPLIES M2816; M1670 & M1672. KNOWN GOOD BATTERIES WERE INSTALLED AT THESE LOCATIONS AND ONCE THEY LOST CHARGE THE POWER SUPPLY DID NOT RECHARGE THEM. THE LIGHTS WOULD THEN ONLY COME ON MOMENTARILY. REF AMM 33-51-06 & WDM 33-51-11.;[03] R&R FWD POWER SUPPLY M2816 PER AMM 33-51-06. VERIFIED CHARGE FUNCTION OPERATIONAL. ORIGINAL BATTERY NOT ACCEPTING CHARGE AND REQUIRES REPLACEMENT. REF AMM 33-51-06 & WDM 33-51-11.;[04] REMOVED AND REPLACED M2816 BATTERY PACK IAW AMM 33-51-06; OPS CHECK GOOD.;[05] REMOVED AND REPLACED M1670 AND M1672 BATTERY PACK CHARGERS IAW AMM 33-51-06; OPS CHECK GOOD.

---
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.