As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HPSOV EICAS MSG ON TAKEOFF ROLL, LEFT ENGINE. RETURNED TO GATE. FOUND LINE TO HPSOV NOT TIGHT. RE-TIGHTENED LINE. RE-ACTIVATED THR/REV FOR MAINT. FOUND TERMS 2 AND 3 ON HPSOV REVERSED. FOUND CONNECTION AT FIREWALL DISCONNECT LOOSE. TIGHTENED CONNECTION. REPLACED HPSOV AND HPC. CHECKED GND BACK TO E3 RACK. RAN ENGINE BLEED. SHIFT NORMAL.