# SDR CALA2026050415939

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 30, 2026
- Submitted: May 4, 2026
- Operation: Air carrier
- Aircraft: [N61882](https://openairdocs.org/aircraft/N61882), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 42201
- Aircraft time: 34,768 hours, 12,827 cycles
- System (JASC): [3800 · Water and Waste System](https://openairdocs.org/jasc/3800)
- Part: Water Heater
- Condition: Odor
- Location: Zone
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026050415939

## Discrepancy

DO THE SMOKE OR FUMES IN THE CABIN, SOURCE UNKNOWN - FAULT ISOLATION PER FIM 21-00 TASK 806. TOMC PL CREW BRIEFED THAT SMELL WAS COMING FROM LAV E, SAID THEY BELIVE THE SMELL WAS COMING FROM UNDER THE SINK. FOUND CB 18-3 F15 LAVATORY E WATER HEATER POPPED. PUSH IN BREAKER & WATER HEATER DOES NOT INDICATE ANY POWER. BELIEVE ODOR OF ELECTRICAL BURNING WAS CAUSED BY LAV E WATER HEATER SYSTEM, FURTHER TROUBLESHOOTING REQUIRED, R & R WATER HEATER ON LAV E, REF. AMM 38-13-01 OPS CHECK GOOD AT THIS TIME. AFTER REPLACEMENT OF WATER HEATER, LEFT WATER HEATER & APU POWER ON FOR AN EXTENDED AMOUNT OF TIME AND COULD NOT DUPLICATE SMOKE OR FUMES SMELL IN THE ACFT.

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