As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE-OFF, RECEIVED BLEED 1 LEAK EICAS MESSAGE. RAN THE CHECK LIST AND RETURNED TO DEPARTURE. FOUND ENGINE BLEED VALVE TO BE BAD. REMOVED AND REPLACED LT ENGINE BLEED VALVE IAW AMM 36-11-05-000-801-A AND 36-11-05-400-801-A. OPS CHECKED GOOD NO DEFECTS NOTED AT THIS TIME. END