Narrative:

While I was programming the FMC prior to departure, I incorrectly entered a warmer than correct reduced thrust temperature. I pulled, via ACARS, the reduced temperature for departure from pdx runway 28R. That temperature was 40 degrees C for our weight that day (including the NOTAM non availability of the last 1000 ft of runway 28R). However, I programmed the FMC with 48 degrees C which caused the reduced power takeoff setting to be much lower than appropriate and, therefore, lengthening the takeoff roll nearly into the last 1000 ft of the runway, which was notamed OTS due to equipment working on the end of runway. Contributing to this incident was 40 degrees and 48 degrees (48 degrees is the reduced number 8 out of 10 times) look very similar on the small ACARS printout, my copilot missed the programming error, and finally my missing the xchk on the pretkof check that the programmed number was really the correct number. It was discovered because I was uncomfortable with the separation on takeoff between ourselves and the equipment. In the future, I will insist that the printout be crosschecked with FMC and the printout be displayed in a prominent place during taxi out.

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Original NASA ASRS Text

Title: B737 CAPT MISREAD THE ACARS TKOF PERFORMANCE INFO AND USED REDUCED TKOF THRUST LOWER THAN REQUIRED.

Narrative: WHILE I WAS PROGRAMMING THE FMC PRIOR TO DEP, I INCORRECTLY ENTERED A WARMER THAN CORRECT REDUCED THRUST TEMP. I PULLED, VIA ACARS, THE REDUCED TEMP FOR DEP FROM PDX RWY 28R. THAT TEMP WAS 40 DEGS C FOR OUR WT THAT DAY (INCLUDING THE NOTAM NON AVAILABILITY OF THE LAST 1000 FT OF RWY 28R). HOWEVER, I PROGRAMMED THE FMC WITH 48 DEGS C WHICH CAUSED THE REDUCED PWR TKOF SETTING TO BE MUCH LOWER THAN APPROPRIATE AND, THEREFORE, LENGTHENING THE TKOF ROLL NEARLY INTO THE LAST 1000 FT OF THE RWY, WHICH WAS NOTAMED OTS DUE TO EQUIP WORKING ON THE END OF RWY. CONTRIBUTING TO THIS INCIDENT WAS 40 DEGS AND 48 DEGS (48 DEGS IS THE REDUCED NUMBER 8 OUT OF 10 TIMES) LOOK VERY SIMILAR ON THE SMALL ACARS PRINTOUT, MY COPLT MISSED THE PROGRAMMING ERROR, AND FINALLY MY MISSING THE XCHK ON THE PRETKOF CHK THAT THE PROGRAMMED NUMBER WAS REALLY THE CORRECT NUMBER. IT WAS DISCOVERED BECAUSE I WAS UNCOMFORTABLE WITH THE SEPARATION ON TKOF BTWN OURSELVES AND THE EQUIP. IN THE FUTURE, I WILL INSIST THAT THE PRINTOUT BE XCHKED WITH FMC AND THE PRINTOUT BE DISPLAYED IN A PROMINENT PLACE DURING TAXI OUT.

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.