As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF ROLL, NR 1 ENGINE ONLY PRODUCED 80.7% N1 WITH 85% COMMANDED, NR 2 WAS NORMAL. EECS WERE ON. NO CAUTIONS OR WARNINGS. AIRBORNE NR 1 WOULD ONLY PRODUCE 83.3% AT 5000'. WHEN BACK AT THE GATE, NR 1 WOULD NOT SHUT DOWN ON ITS COMMAND TO CUTOFF. IT DID SHUTDOWN ON SECOND ATTEMPT IDLE BACK TO CUT OFF. REMOVED AND REPLACED NR 1 ENGINE FUEL PUMP PACKAGE IAW MT773-11-00. ENGINE RUN AND LEAK CHECKED NORMAL.