As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON POWER UP FOR TAKEOFF, ANTI ICE ON. LEFT ENGINE BLEED CYCLED OFF. LEFT ENG ANTI-ICE SELECTED ON BLEED TRIPS AT POWER SETTINGS ABOVE 50% N1.IF ANTI-ICE IS SELECTED TO OFF POSITION BLEED DOES NOT TRIP. RESET LEFT ENGINE ANTI-ICE AND BLEED SWITCHES-NO HELP. ACCOMPLISHED AIR SUPPLY CONTROL SYSTEM CHECK PER MM, NO FAULTS NOTED. ACCOMPLISHED ENGINE PWR RUN PER JRH 2-6-1 ANTI-ICE SYSTEM OPERATING NORMAL AT THIS TIME WITH RIGHT AND LEFT BLEED AND ANTI-ICE ON.