As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOW SPEED REJECT AT 50KT DUE TO L ENG BLEED OFF EICAS MESSAGE. REF FIM 36 90 03 71 FOR TROUBLESHOOTING REMOVED AND INSTALLED #1 ENG PRSOV REF AMM 36-11-09 FROM A THRU (3)AC. NEEDS OPS CHK AND LEAK CHK PARTS USED: 19-2151-9-0005,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1369263 SN OFF 1279 VALVE, PNEU, PR OFF 19-3611-9-0004 1279 ON 19-3611-9-0004 1481