Narrative:

At the same time the non-flying pilot said V1 vr, a (tail pipe hot) left engine warning came visual and audible from the central warning panel of the aircraft. An abort of the takeoff was initiated, but the aircraft lifted off the runway for approximately 2 to 3 seconds. After landing, we stopped the aircraft on the remaining runway, exited the runway on next taxiway. After following our checklists and determining there was a false indication we shut down the engine as a precaution informed the tower of our problem. Bad heat sensors on the engine gave the false warning. Every time it rains heavy the sensors get wet. I have not seen a permanent fix to this problem yet. In 4 yrs I had 3 occurrences of the same problem. At 2 different carriers. Callback conversation with reporter revealed the following information: the reporter stated the airline was a saab 340B with 2 general electric CT7-9b2 engines. The reporter said this engine is troubled with chronic false hot tailpipe warnings caused by defective or poorly designed tailpipe sensors or thermocouples. The reporter stated the problem exists mainly when the WX is raining or misty. The reporter said several corrective actions and improved parts have been installed, but the problem still persists.

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Original NASA ASRS Text

Title: A SAAB 340B ON TKOF ROLL AT V1 ROTATION REJECTED THE TKOF DUE TO AURAL AND VISUAL HOT TAILPIPE WARNING ON #1 ENG CAUSED BY FAILED HEAT SENSORS.

Narrative: AT THE SAME TIME THE NON-FLYING PLT SAID V1 VR, A (TAIL PIPE HOT) L ENG WARNING CAME VISUAL AND AUDIBLE FROM THE CENTRAL WARNING PANEL OF THE ACFT. AN ABORT OF THE TKOF WAS INITIATED, BUT THE ACFT LIFTED OFF THE RWY FOR APPROX 2 TO 3 SECS. AFTER LNDG, WE STOPPED THE ACFT ON THE REMAINING RWY, EXITED THE RWY ON NEXT TXWY. AFTER FOLLOWING OUR CHKLISTS AND DETERMINING THERE WAS A FALSE INDICATION WE SHUT DOWN THE ENG AS A PRECAUTION INFORMED THE TWR OF OUR PROB. BAD HEAT SENSORS ON THE ENG GAVE THE FALSE WARNING. EVERY TIME IT RAINS HEAVY THE SENSORS GET WET. I HAVE NOT SEEN A PERMANENT FIX TO THIS PROB YET. IN 4 YRS I HAD 3 OCCURRENCES OF THE SAME PROB. AT 2 DIFFERENT CARRIERS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE AIRLINE WAS A SAAB 340B WITH 2 GENERAL ELECTRIC CT7-9B2 ENGS. THE RPTR SAID THIS ENG IS TROUBLED WITH CHRONIC FALSE HOT TAILPIPE WARNINGS CAUSED BY DEFECTIVE OR POORLY DESIGNED TAILPIPE SENSORS OR THERMOCOUPLES. THE RPTR STATED THE PROB EXISTS MAINLY WHEN THE WX IS RAINING OR MISTY. THE RPTR SAID SEVERAL CORRECTIVE ACTIONS AND IMPROVED PARTS HAVE BEEN INSTALLED, BUT THE PROB STILL PERSISTS.

Data retrieved from NASA's ASRS site as of July 2007 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.