# SDR CALA2026042315640

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 22, 2026
- Submitted: April 23, 2026
- Operation: Air carrier
- Aircraft: [N75435](https://openairdocs.org/aircraft/N75435), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 33529
- Aircraft time: 52,364 hours, 18,849 cycles
- System (JASC): [3397 · Light System Wiring](https://openairdocs.org/jasc/3397)
- Part: Elec Connector
- Condition: Disconnected
- 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/CALA2026042315640

## Discrepancy

EMERGENCY LIGHTS - OPERATIONAL CHECK EMERGENCY LIGHTS OPERATIONAL CHECK - R1 DOOR EXIT SIGN AND OVERHEAD LIGHT NOT ILUMINATING DURING EMER LIGHT TEST. REMOVED AND REPLACED FWD RH POWER SUPPLY FUSES REF AMM 33-51-06. NO FIX R1 DOOR EXIT SIGN DOES NOT COME ON. SWAPPED LH AND RH FWD PSU, NO CHANGE TO INDICATION. SWAPPED BACK TO ORIGINAL POSITION.  WHEN CHECKING CONTINUITY FROM EXIT SIGN TO BATTERY PACK REF WDM 33-51-12-6.1.  FOUND CIRCUIT TO BE OPEN FROM BATTERY PACK CONNECTOR D10748 TO EMERGENCY EXIT SIGN ISOLATED AT CONNECTOR D2968 AND STILL READ AN OPEN CIRCUIT. UPON FURTHER INVESTIGATION FOUND CONNECTOR D40042 DISCONNECTED. SAID CONNECTOR IS ABOVE THE GALLEY AND WILL REQUIRE FURTHER DISASSEMBLY OR MOVING OF THE GALLEY TO REACH AND RECONNECT DISPLACED FWD GALLEY AREA CEILING PANEL REF AMM  25-21-34. CONNECTED CONNECTOR D40042 REF WIRING DIAGRAM 33-51-12. RESTORED FWD GALLEY CEILING PANEL REF AMM TASK 25-21-34-400-801. OPERATIONAL TEST OF EMERGENCY LIGHTS PASSED REF AMM 33-51-00-710-801.

---
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.