# SDR DXTA2026022707032

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 2026
- Submitted: February 27, 2026
- Operation: Air carrier
- Aircraft: [N257QS](https://openairdocs.org/aircraft/N257QS), registered now
- Make and model: Cndair CL6002B16
- Aircraft serial: 6191
- Aircraft time: 2,438 hours, 1,335 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Acm
- Part number: 5861109
- Part serial: 5267
- Condition: Failed
- Location: Zone 100
- 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/DXTA2026022707032

## Discrepancy

ON CLIMB OUT, SMELLED A STRONG UNUSUAL ODOR. SLIGHTLY DISSAPATED EN CRUISE BUT ON APPROACH TO LAND, SMELL CAME BACK. SMELLS LIKE WARM METALIC OR GREASE. THE SMELL CONTINUES AFTER SHUTDOWN BUT ONLY IN THE COCKPIT NOT THE CABIN.  NOTICED A HIGH-PITCHED WHINE, AND A ODOR OF GREASE ONLY FROM COCKPIT COOLING VENTS. PERFORMED TORQUE CHECK ON LT ACM COOLING TURBINE, FAILED. REPLACED UNIT, ALSO NOTICED WATER SEPARATOR O-RINGS LEAKING GREASE INTO WATER SOCK. REPLACED WATER SOCK AFTER CLEANING WATER SEPARATOR. PERFORMED GOOD OP CHECKS FOR ACM AND RESTORED ACFT TO ORIGINAL CONFIGURATION. ODOR IS GONE FROM COCKPIT. WORKED IAW AMM 21-51-16. 21-51-13 & LEAK TEST  PERFORMED IAW AMM 21-51-00-790-801.

---
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.