# SDR CALA2025082508091

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 21, 2025
- Submitted: August 25, 2025
- Operation: Air carrier
- Aircraft: [N38443](https://openairdocs.org/aircraft/N38443), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 31655
- Aircraft time: 45,946 hours, 16,555 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Filter
- Condition: Odor
- Location: Zone 100
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025082508091

## Discrepancy

AT ENG START TILL 10000 FT STRONG FOUL SMELL FROM PACKS ORD MX DEBRIEFED CREW, PER CREW SMELL FOUL ODOR SMELL RETURNED ON LANDING. PER TOMC AND AMM 5-51-26, REMOVED AND REPLACED RECIRCULATION AIR FILTER REF AMM 21-25-01 ADD EMP:U105424 PER TOMC STILL REQUIRES HIGH POWER RUN TOMC HAS BEEN CONTACTED, AND THEY WOULD LIKE US TO PERFORM AMM 05-51-26-800-801-C1 FOR THE SMOKE / ODOR FOCUSING ON THE ODOR SECTIONS AS IT IS NOT REPORTED AS AN ELECTRICAL SMELL. PERFORMED AMM 05-51-26-800-801-C1 FOR THE SMOKE / ODOR FOCUSING ON THE ODOR SECTIONS, PERFORMED ENGINE RUNS, ODOR NO LONGER PRESENT AT THIS TIME

---
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.