As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ROLL, NR (1) ENGINE WOULD NOT ACCELERATE PAST 78 PERCENT. NR 2 WITH CORRESPONDING LOW N1, FUEL FLOW AND EGT. THE CREW REJECTED TAKEOFF AND RETURNED TO BLOCKS. MAINT INSPECTED AND FOUND LOOSE PT2 LINE ON PRBC VALVE. MAINT RECONNECTED LINE. OPERATIONAL CHECK GOOD. ACFT WAS RETURNED TO SERVICE. (K)