As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER L ENG START, L ENG BLEED OFF EICAS MESSAGE AND LIGHT. CREW DID A GROUND TURN BACK (BTB). MTC PERFORMED AIR SUPPLY BITE IAW FIM 36-20-00. PERFORMED ENG RUN IAW AMM 71-00-00 & 36-11-09. NO FAULTS FOUND. A/C REMAINS NO ETOPS. A/C RETURNED TO SERVICE.