As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING APROACH, THE PILOT FOUND THAT THE LT ENGINE POWER WAS LOW. AFTER A GROUND RUN IT APPEAR THAT THIS ENGINE WAS UNDER POWER. BLEED VALVE HAS BEEN REMOVE AND THE DIAPHRAGM FOUND TEAR WERE IT NORMALLY BEND. PART HAS BEEN REPLACE AND ACFT RETURN IN SERVICE. BLEED VALVE WAS INSTALLED ON SN:PCE-PG0173 ENGINE TIME SINCE O/H 4457.4 INSTALLED ON DECEMBER 2008. TOTAL AIRFRAME TIME 19518.4, CYCLE 17056.