# SDR CALA2022061301492

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 13, 2022
- Submitted: June 13, 2022
- Operation: Air carrier
- Aircraft: [N75436](https://openairdocs.org/aircraft/N75436), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 33531
- Aircraft time: 41,377 hours, 14,471 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Loop
- Part number: NA
- Condition: Faulty
- Location: Na
- Stage of operation: TO
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A, C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2022061301492

## Discrepancy

FIRE WARN LIGHT ON DASH ILLUMINATED ON TAKEOFF ROLL NO OTHER LTS ILLUMINATED CODE : 84 ON THE BITE TEST...AFTER DISCONNECTED WHEEL WHEEL FIRE DETECTOR, WARNING LIGHT EXTINGUISHED.SUSPECTED FIRE DETECTION LOOP ON KNEEL  BEAM BAD.FURTHER TROUBLESHOOTING INDICATED LOOP M270 AT FAULT REF WDM26-12-11-5. REPLACED LOOP M270 IAW AMM26-18-02. CONFIRMED WHEEL WELL FIRE DET SYS ACTIVATED AND TESTS NORMAL. WHEEL WELL FIRE DET SYS OK FOR SVC, REMOVED DEFER STICKER. PER LP 8788539 : WHEEL WELL FIRE LT ILLUMINATED ON CLIMB OUT. LIGHT EXTINGUISHED AFTER APPROX 5 MIN.WHEEL WELL FIRE LT ILLUMINATED ON CLIMB OUT. LIGHT EXTINGUISHED AFTER APPROX 5 MIN.DEACTIVATED THE WHEEL WELL FIRE DETECTION SYSTEM AND VERIFY BRAKES ARE COOL TO THE TOUCH BEFORE ENGINE START IN REFERENCE WITH MEL 2604B.THIS ITEM CORRECTED PER LOG PG 8789135

---
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.