# SDR DXTA2026081709281

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 14, 2026
- Submitted: August 17, 2026
- Operation: Air carrier
- Aircraft: [N551QS](https://openairdocs.org/aircraft/N551QS), registered now
- Make and model: Cessna 680A
- Registry model: [Cessna 680A](https://openairdocs.org/model/cessna-680a) (OpenAirDocs)
- Aircraft serial: 680A0151
- Aircraft time: 8,619 hours, 5,678 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Overheat Sensor
- Part number: 99145192
- Part serial: 3BR100
- Condition: Faulty
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2026081709281

## Discrepancy

DURING CLIMB THROUGH FL250,  SELECTED ANTI ICE ALL ON. AFTERWARDS WE BEGAN TO SMELL AN ABNORMAL ODOR CONSISTENT WITH BURNING. AFTER ASKING EACH OTHER ABOUT IT, WE RECEIVED A BLD AIR O'TEMP R AMBER CAS MESSAGE. COMPLETED THE QRH, & ODOR DISSIPATED AND CAS MESSAGE WENT OUT & DID NOT RETURN. HIGHEST ALTITUDE CLIMBED WAS FL270. ELECTED TO LEAVE ANTI-ICE ON UNTIL WERE SURE DIDN'T NEED IT FOR THE REMAINDER OF THE FLIGHT. DIVERTED TO LAS.  REMOVED FROM  ACFT & FROM SERVICE THE RH FWD PRECOOLER TEMP CONTROL SENSOR (TT004)  DUE TO A "BLD AIR O'TEMP R" AMBER CAS. MSG. DURING FLT. THEN INSTALLED IAW THE AMM 36-10-45, A NEW, CUSTOMER SUPPLIED, RH FWD PRECOOLER TEMP CONTROL SENSOR (TT004). CONDUCTED REQUIRED LEAK & FUNCTIONAL TEST,  NO FAULTS NOTED.

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