Narrative:

We started the takeoff roll with the first officer flying. Between 110 KTS and 120 KTS with a computed V1 of 129 KTS, the #2 egt spiked up then rolled back towards zero. I rejected the takeoff due to what I thought was an engine failure. We accomplished the memory items and cleared the runway. After talking with tower, then the cabin crew and customers, we ran through the QRH. The book dictated that we not taxi for 53 mins, so we held on the taxiway until past the cooling time. The egt failure and the high energy stop parameters were entered into the logbook as separate entries. I talked extensively with dispatch as we were waiting to taxi back to the gate. 2 customers complained about back pain and were met by paramedics back at the gate. The #2 engine had not failed, it had been only an egt indicator failure. Mitigating factors were WX advisories for wind and rain cells coming in over the mountains to the west. We had lined up on the runway for a min or two to take a good look at the approaching WX, so I was primed a bit. I realized when I saw the egt indications that we were quickly approaching V1 and that I had to make a call on the engine status. I decided to stop. Interestingly, after we had pulled off the runway, the predictive windshear warning annunciated. The warning had nothing to do with the rejected takeoff but is background information to help explain my mindset as we pushed up the throttles.

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Original NASA ASRS Text

Title: FLT CREW OF B737-300 REJECT TKOF AT HIGH SPD WHEN #2 ENG EGT INDICATION FAILS.

Narrative: WE STARTED THE TKOF ROLL WITH THE FO FLYING. BTWN 110 KTS AND 120 KTS WITH A COMPUTED V1 OF 129 KTS, THE #2 EGT SPIKED UP THEN ROLLED BACK TOWARDS ZERO. I REJECTED THE TKOF DUE TO WHAT I THOUGHT WAS AN ENG FAILURE. WE ACCOMPLISHED THE MEMORY ITEMS AND CLRED THE RWY. AFTER TALKING WITH TWR, THEN THE CABIN CREW AND CUSTOMERS, WE RAN THROUGH THE QRH. THE BOOK DICTATED THAT WE NOT TAXI FOR 53 MINS, SO WE HELD ON THE TXWY UNTIL PAST THE COOLING TIME. THE EGT FAILURE AND THE HIGH ENERGY STOP PARAMETERS WERE ENTERED INTO THE LOGBOOK AS SEPARATE ENTRIES. I TALKED EXTENSIVELY WITH DISPATCH AS WE WERE WAITING TO TAXI BACK TO THE GATE. 2 CUSTOMERS COMPLAINED ABOUT BACK PAIN AND WERE MET BY PARAMEDICS BACK AT THE GATE. THE #2 ENG HAD NOT FAILED, IT HAD BEEN ONLY AN EGT INDICATOR FAILURE. MITIGATING FACTORS WERE WX ADVISORIES FOR WIND AND RAIN CELLS COMING IN OVER THE MOUNTAINS TO THE W. WE HAD LINED UP ON THE RWY FOR A MIN OR TWO TO TAKE A GOOD LOOK AT THE APCHING WX, SO I WAS PRIMED A BIT. I REALIZED WHEN I SAW THE EGT INDICATIONS THAT WE WERE QUICKLY APCHING V1 AND THAT I HAD TO MAKE A CALL ON THE ENG STATUS. I DECIDED TO STOP. INTERESTINGLY, AFTER WE HAD PULLED OFF THE RWY, THE PREDICTIVE WINDSHEAR WARNING ANNUNCIATED. THE WARNING HAD NOTHING TO DO WITH THE REJECTED TKOF BUT IS BACKGROUND INFO TO HELP EXPLAIN MY MINDSET AS WE PUSHED UP THE THROTTLES.

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.