As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE LOW LIMIT VALVE WAS OBSERVED TO STICK IN AN OPEN POSITION AND WOULD NOT MODULATE. AFTER REMOVAL OF THE VALVE THE BUTTERFLY WAS FOUND TO BE SCRAPING AGAINST THE BODY OF THE VALVE.ANOTHER VALVE WITHTHIS CONDITION HAD PREVIOUSLY BEEN FOUND TO SHEAR THE BUTTERFLY SHAFT COMPLETLY. REF. SDR 2004051401.