As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO MIA DUE TO LEFT ENGINE BLEED DISCREPANCY. LEFT HAND DUCT LEAK LIGHT CAME ON WITH BLEED DUCT LEAK EICAS MESSAGE. FOUND NO PNEUMATIC SYSTEM FAULT. CHECKED LEFT AND RIGHT WING AND BODY DUCT LEAK DETECTION SYSTEM. FOUND NO FAULTS PER MM 26-18-00 PAGE 107. NO HISTORY OR SUBSEQUENT WRITE-UPS.