A B757-200 RPTS L ENG DID NOT MAKE CALCULATED TKOF PWR 1 PT 76 EPR MADE 1 PT 70 EPR. CLB AND CRUISE PARAMETERS NORMAL.

Narrative

FLT WAS PLANNED FOR A STANDARD PWR TKOF FOR RWY 8L AT ZZZ. DERATED TKOF WAS SELECTED ON THE TMC. APCHING THE RWY I NOTICED THE WINDSOCK INDICATING A POSSIBLE TAILWIND AND MENTIONED THAT TO FO (PF) WHO SELECTED TOGA TO SELECT MAX PWR. WE WERE CLRED FOR TKOF WITH THE WIND RPTED CALM. AUTOTHROTTLES WERE ARMED AND EPR ENGAGED. THE L ENG APPEARED TO LAG SLIGHTLY BEHIND THE R ON ACCELERATION. I ADVANCED THE L THROTTLE TO ACHIEVE THE MAX EPR SETTING OF 1.76 ONLY TO HIT THE STOPS ON THE QUADRANT. BY THAT TIME WE HAD ACCELERATED THROUGH 80 KTS. THE MAX TKOF EPR THAT WAS OBTAINED ON THE L ENG WAS 1.70 WHICH WAS THE STANDARD PWR EPR SETTING. MAX PWR WAS NOT REQUIRED FOR OUR TKOF AND STANDARD PWR WAS OBTAINED ON THE L ENG SO I ELECTED TO CONTINUE THE TKOF. DURING CLBOUT ALL ENG PARAMETERS WERE NORMAL. I SELECTED CONTINUOUS PWR ON THE TMC AND BOTH ENGS ACHIEVED MAX CONTINUOUS PWR. THEN I RESELECTED CLB FOR THE REMAINDER OF THE CLBOUT. OFF TIME ZZZ WAS AT XA42Z. ALL ENG PARAMETERS DURING THE REST OF THE FLT WERE NORMAL. THE FOLLOWING WAS MY RIGHT UP TO ACR MAINT L ENG DID NOT PRODUCE MAX PWR ON TKOF FROM ZZZ; 1.76 EPR COMMANDED 1.70 EPR ACHIEVED. ALL OTHER PARAMETERS NORMAL. CLB AND CRUISE PERFORMANCE NORMAL.