As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE MAINTENANCE WAS CARRYING OUT POWER ASSURANCE CHECK IT WAS NOTED THAT THE TORQUE WAS LOW. TROUBLESHOOTING WAS ACCOMPLISHED BY MAINTENANCE AND FOUND A DEFECTIVE ANTI-ICE VALVE. THE ANTI-ICE VALVE FOUND TO HAVE CRACKED WHERE IT ATTACHES TO THE COMPRESSOR SHCROLL. THE DEFECTIVE VALVE WAS CHANGED WITH A POWER AND LEAK CHECK CARRIED WITH NO FURTHER FAULT AND TORQUE WITH IN THE SPECIFIED LIMITS.