# SDR UHLA2009090400057

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 4, 2009
- Submitted: September 8, 2009
- Operation: Air carrier
- Aircraft: [N642RW](https://openairdocs.org/aircraft/N642RW), registered now
- Make and model: Emb ERJ 170-100 SE
- Registry model: [EMB ERJ 170-100 SE](https://openairdocs.org/model/embraer-erj-170-100-se) (OpenAirDocs)
- Aircraft serial: 17000063
- Aircraft time: 13,261 hours, 8,424 cycles
- System (JASC): [3412 · Outside Air Temperature Indicator/Sensor](https://openairdocs.org/jasc/3412)
- Part: Probe
- Part number: 102AW1AF
- Part serial: A61331
- Condition: Inoperative
- Location: Tat
- Part time: 4,049 hours, 2,499 cycles
- Stage of operation: DE
- How discovered: O
- Nature of condition: J, B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UHLA2009090400057

## Discrepancy

DURING DESCENT INTO KCID, TAT 2 FAIL MESSAGE APPEARED, FOLLOWED BY AUTO THROTTLE DISCONNECT.  AIRCRAFTS AUTO PILOT FROZE ON FPA VERTICAL MODE AND WOULD NOT CAPTURE PRESELECTED ALTITUDE.  SWITCHED SOURCE SIDE TO CAPT AND REGAINED AUTOMATION.  FIVE MINUTES LATER, SMELLED A FAINT ELECTRICAL BURNING SMELL.  F/A REPORTED SAME SMELL IN CABIN.  NO SIGN OF VISIBLE SMOKE OR FUMES (EXCEPT FOR FAINT SMELL).  NO EMERGENCY DECLARED.  MAINTENANCE REMOVED AND REPLACED THE TAT 2, ADSP 4, AND TAT 2 C/P.

---
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.