# SDR DXTA201710300001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 28, 2017
- Submitted: October 30, 2017
- Operation: Air carrier
- Aircraft: [N504QS](https://openairdocs.org/aircraft/N504QS), registered now
- Make and model: Cessna 680CE
- Aircraft serial: 680A0041
- Aircraft time: 1,045 hours, 677 cycles
- System (JASC): [2100 · Air Conditioning System](https://openairdocs.org/jasc/2100)
- Part: Duct
- Part number: 741453159
- Condition: Damaged
- Location: Apu
- Part time: 1,045 hours, 677 cycles
- Stage of operation: LD
- How discovered: O
- Nature of condition: B, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA201710300001

## Discrepancy

IN FLIGHT COULD NOT CONTROL TEMPERATURES,  GOT HOT,  THEN A BURNING ODOR,  ON TOUCH DOWN THE ACM TEMP EICAS MESSAGE WAS DISPLAYED.  FOUND APU RESTRICTOR DAMAGED. REPLACED DUCT, COUPLINGS AND O-RINGS.

---
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.