# SDR CALA2026022013934

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 19, 2026
- Submitted: February 20, 2026
- Operation: Air carrier
- Aircraft: [N67845](https://openairdocs.org/aircraft/N67845), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 42185
- Aircraft time: 34,492 hours, 12,662 cycles
- System (JASC): [2613 · Overheat Detection](https://openairdocs.org/jasc/2613)
- Part: Overheat Loop
- Part number: 35008307
- Part serial: 0621
- Condition: Faulted
- Location: Zone 100
- Part time: 77,868 hours, 28,086 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026022013934

## Discrepancy

RT WING-BODY OVERHEAT DURING CLIMB & CRUISE.  PERFORMED CHECKLIST,  NO HELP.  DIVERTED BACK.   PER FLIGHT CREW:  RT WING - BODY OVERHEAT CAME ON & STAYED ON,  AFTER QRH PERFORMED. DID NOT EXTINGUISH UNTIL THROTTLES RETARDED FOR DESCENT.  LIGHT REMAINED OFF FOR DURATION OF FLIGHT.   PERFORMED HIGH POWER ENGINE RUNS IAW AMM 71-00-00-700-823-F00.  RT WING - BODY OVERHEAT LIGHT ILLUMINATED DURING RUN. THROTTLES TO IDLE. LIGHT EXTINGUISHED.   PERFORMED BITE OF WHEEL WELL FIRE, WING - BODY OVERHEAT DETECTION CONTROL MODULE IAW AMM 26-18, TASK 801. SHOWS ONLY CODE 64.   RT WING LE & A/C PACK BAY,  ALARM.  CLEARED MEMORY OF ORIGINAL M237 MODULE.  INSTALLED A KNOWN GOOD M237 MODULE (WHEEL WELL FIRE, WING - BODY OVER HEAT MODULE) . PERFORMED HIGH POWER RUN FAULT RETURNED.  REMOVED KNOWN GOOD M237 MODULE. REINSTALLED ORIGINAL M237 MODULE IAW AMM 26-18-00-710-801.  NO FAULT. CHECKED DUCTS FOR LEAKAGE ON FAULT 64,  RIGHT WING LE & A/C PACK BAY IAW TSM 26-18 TASK 802 STEP B.3. NO LEAKS NOTED.   MANAGEMENT PERFORMED GVI OF M1763 & M1764 OVERHEAT DETECTORS & OTHERS. NO DEFECTS OR LEAKS NOTED. FOLLOWING FIM 26-81 TASK 802 & USING OVERHEAD LIGHT DID NOT ILLUMINATE DURING RUNS. IAW AMM 71-00-00-700-823-F00.

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