As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) LEFT 14TH DUCT WARNING ON AT TAKEOFF ROLL ABOVE V, ON EICAS, RED BY ENGINE. AIRCRAFT RETURNED TO TORONTO. RIGHT BLEED LEAK DETECTION CONTROL UNIT AND LOOP SENSING ELEMENT (A58WK) REPLACED.OPERATIONAL TEST OF 14TH STAGE BLEED PERFORMED AND OPERATION TEST OF BLEED LEAK DETECTION PERFORMED.ALL TESTS OK UNABLE TO FAULT SYSTEM, CHECKED SERVICEABLE.