Narrative:

During takeoff roll, our EPR was 2.05 with engine anti-ice on. Initial power application was normal. Autothrottles were engaged. V1 was 135 KIAS and the runway had patchy ice and was wet. Between 120 KIAS and 130 KIAS, I noticed the #1 engine thrust was slightly below #2. I pushed up the throttle manually to the maximum thrust position as we passed V1 and rotate speed. The EPR was only showing 1.98 versus 2.05 on #2, despite the maximum thrust position. In-flight, the thrust behaved normally and the throttles maintained good alignment. Despite the normal climb, cruise, and descent power acting normally, I chose to write up the aircraft for not achieving takeoff rated thrust.

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Original NASA ASRS Text

Title: AN ACR MLG CAPT TOOK OFF WITH 1 ENG INDICATING OR DEVELOPING LESS THAN DESIRED PWR.

Narrative: DURING TKOF ROLL, OUR EPR WAS 2.05 WITH ENG ANTI-ICE ON. INITIAL PWR APPLICATION WAS NORMAL. AUTOTHROTTLES WERE ENGAGED. V1 WAS 135 KIAS AND THE RWY HAD PATCHY ICE AND WAS WET. BTWN 120 KIAS AND 130 KIAS, I NOTICED THE #1 ENG THRUST WAS SLIGHTLY BELOW #2. I PUSHED UP THE THROTTLE MANUALLY TO THE MAX THRUST POS AS WE PASSED V1 AND ROTATE SPD. THE EPR WAS ONLY SHOWING 1.98 VERSUS 2.05 ON #2, DESPITE THE MAX THRUST POS. INFLT, THE THRUST BEHAVED NORMALLY AND THE THROTTLES MAINTAINED GOOD ALIGNMENT. DESPITE THE NORMAL CLB, CRUISE, AND DSCNT PWR ACTING NORMALLY, I CHOSE TO WRITE UP THE ACFT FOR NOT ACHIEVING TKOF RATED THRUST.

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.