# SDR CALA2026041915469

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 17, 2026
- Submitted: April 20, 2026
- Operation: Air carrier
- Aircraft: [N67845](https://openairdocs.org/aircraft/N67845), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 42185
- Aircraft time: 34,895 hours, 12,832 cycles
- System (JASC): [3397 · Light System Wiring](https://openairdocs.org/jasc/3397)
- Part: Wire
- Part number: 3404302
- Condition: Damaged
- 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/CALA2026041915469

## Discrepancy

ROWS 22-28 EMERGENCY LIGHTS WILL NOT LIGHT UP ON TEST, T/S IAW FIM 33-50 TASK 801, WDM 33-51-22-7, AND SDS 33-51-00-005. FOUND POWER SUPPLY PACKS M1673, M1672, M1671, M2626, AND M2627 TO ALL FUNCTION PROPERLY IAW AMM 33-51-06-710-004. WHEN USING TEST SWITCH ON POWER SUPPLY PACK M1670 FOUND NO LIGHTS COME ON, SLAVED IN M1670 IAW AMM 33-51-06-960-806, NO FIX. REINSTALLED ORIGINAL M1670 IAW AMM 33-51-06. SHOT WIRE 12 FROM CONNECTOR D10716 TO GROUND AND FOUND 1.5M OHMS, SUSPECT WIRE BROKE OR LOOSE. CHECKED WIRES RUNNING TO ROWS 22-28 PATHWAY LIGHTS FOR SECURITY AND CONDITION, NO DEFECTS NOTED.  FURTHER T/S REQUIRED.  T/S IAW WDM 33-51-22,  NO SHORT NOTED FROM PIN 12 OF CONNECTOR D10716. LIGHTS TURN ON FOR 3 MIN THEN TURN OFF. SLAVED IN KNOWN GOOD BATTERY PACK INTO (M1670)  IAW AMM 33-51-06,  FAULT FOLLOWED PUT BATTERY PACKS INTO ORIGINAL POSITION (M1670) BATTERY PACK REQUIRES REPLACMENT. SLAVED IN NEW POWER SUPPLY &  BATTERY PACK IAW AMM 33-51-06, NO HELP FUTHER T/S REQUIRED CONFIRMED RECEIVING 6.23 VOLTS DC FROM D13258 PIN 2 TO GROUND.  PERFORMED CONTINUITY CHK FROM PIN 2 TO PIN 5 ON OPPOSITE SIDE OF CONNECTOR THROUGH PATHWAY LIGHTING CIRCUIT. FOUND NO CONTINUITY. TRACED WIRE TO SEAT TRACK OF ROW 26ABC AND FOUND 2 DAMAGED JIFFY JUNCTION SPLICE CONNECTORS. REMOVED AND REPINNED NEW SPLICES IN REFERENCE WITH SWPM 20-90-11. OPS CHECK GOOD. RETURNED SEAT TRACK TO SERVICEABLE CONDITION.  OK FOR SERVICE.

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