As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) REJECTED TAKEOFF DUE TO #1 ENGINE NOT GOING TO FULL POWER (MAX 50%). CREW RETURNED TO THE GATE DEPLANED PASSENGERS. RDC NP LDG SWITCH RESET AND AIRCRAFT POWER DOWN/POWER UP COMPLETED. ANOTHER RUN SAME RESULT. MAINTENANCE REPLACED THE #1 FLOW DIVIDER , ENGINE RUNS AND LEAK CHECKS PERFORMED AND AIRCRAFT RETURNED TO SERVICE. (TC# 20190731015)