As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TROUBLESHOOTING TO DETERMINE ENGINE LOW POWER CAUSE, FLAP OF THE BLEED VALVE FOUND LOOSE. FLAP CAN BE ROTATED EASILY BY HAND. BLEED VALVE REPLACED. FLY TEST C/O. NORMAL OPERATION OF THE NEW BLEED VALVE, BUT THIS WAS NOT THE CAUSE OF LOW POWER ISSUE.