As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) RH ENGINE LOW TORQUE DURING TAKEOFF - INVESTIGATION COULD FIND NO FAULT EXCEPT THAT WHEN THE BLEED AIR WAS TURNED ON THE POWER DROPPED - AIRCREW MAINTAINED BLEED AIR WAS TURNED OFF DURING TAKEOFF - NO CONCLUSIVE CAUSE COULD BE FOUND AND ENGINE TORQUE HAS BEEN OK SINCE