# SDR IPXA2026011513640

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 15, 2026
- Submitted: January 15, 2026
- Operation: Air carrier
- Aircraft: [N446UP](https://openairdocs.org/aircraft/N446UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 27735
- Aircraft time: 38,762 hours, 21,150 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Unknown
- Condition: Odor
- Location: Cabin
- Stage of operation: CL
- 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/IPXA2026011513640

## Discrepancy

AT APPLICATION OF TAKEOFF POWER AND DURING CLIMB-OUT, THE STRONG ODOR OF DIRTY WET SOCK EXISTED. THE SMELL LESSENED A BIT DURING CRUISE BUT WAS STILL NOTABLY PRESENT FOR THE REMAINDER OF THE FLIGHT. AT SDF MGMT REQUEST, OPERATED LEFT AND RIGHT AIR PACKS FOR APPROX 2 HOURS, RANGING TEMPERATURES AND ISOLATING TO LEFT ONLY OR RIGHT ONLY. SMELL REMAINED STRONG FOR APPROX 50 MINS AND BEGAN TO DISSIPATE. PRESENCE OF SMELL STILL EXISTS BUT IS NOT AS STRONG IN ODOR MORE CLOSELY RESEMBLING AN OILY SMELL AND IS MOST INTENSE AT MAX TEMP SETTING. ENGINE RUNS REQUIRED FOR VERIFICATION OF SYS CONTAMINATION REMOVAL REF AMM TASK 21-00-01-002-001 AND FIM 21-00-01/301.

---
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.