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B757 first officer reports tat (total air temperature) probe failure climbing through 10000 feet; affecting multiple aircraft systems and requiring a return to departure airport.
| Attributes | |
| ACN | 853879 |
| Time | |
| Date | 200909 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Flight Dynamics |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
After take off; and climbing through 10;000 ft; we received a 'tat (total air temperature) probe' EICAS msg as well as the overhead 'tat' annunciator light. A few seconds after that; the auto throttles disconnected as well as the autopilot. Neither would re-engage. We then received a 'VNAV/perf info unreliable' msg on the FMC; and an amber line through LNAV on the ADI display. Captain took over radio with ATC and I performed the applicable QRH procedures. Because the aircraft was now operating in a degraded state; we were unable to continue into the nat track system. I contacted our maintenance and they suggested to use the alternate air data source; but that provided no improvements. After a phone patch with dispatch; and a discussion with maintenance; we decided to return for an overweight landing at approximately 225;000 lbs. The captain hand flew the rest of the flight while I performed the QRH procedures for an overweight landing; the weather was VFR and the landing was smooth and uneventful with a touchdown of 150fpm. We returned to the gate; swapped passenger and bags into a new aircraft; and proceeded to destination.
Original NASA ASRS Text
Title: B757 first Officer reports TAT (Total Air Temperature) Probe failure climbing through 10000 feet; affecting multiple aircraft systems and requiring a return to departure airport.
Narrative: After take off; and climbing through 10;000 ft; we received a 'TAT (Total Air Temperature) Probe' EICAS msg as well as the overhead 'TAT' annunciator light. A few seconds after that; the auto throttles disconnected as well as the autopilot. Neither would re-engage. We then received a 'VNAV/PERF info unreliable' msg on the FMC; and an amber line through LNAV on the ADI display. Captain took over radio with ATC and I performed the applicable QRH procedures. Because the aircraft was now operating in a degraded state; we were unable to continue into the NAT track system. I contacted our maintenance and they suggested to use the alternate air data source; but that provided no improvements. After a phone patch with dispatch; and a discussion with maintenance; we decided to return for an overweight landing at approximately 225;000 lbs. The Captain hand flew the rest of the flight while I performed the QRH procedures for an overweight landing; The weather was VFR and the landing was smooth and uneventful with a touchdown of 150fpm. We returned to the gate; swapped PAX and bags into a new aircraft; and proceeded to destination.
Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.