What was found
DURING ANNUAL INSPECTION FOUND ALTERNATE AIR VALVE HINGE WORN THRU. REMOVED HEAT BOX ASSY AND FOUND BOX CRACKED 50 PERCENT AROUND MOUNTING FLANGE. CRACK COULD NOT BE SEEN WITH BOX ON AIRCRAFT.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING ANNUAL INSPECTION FOUND ALTERNATE AIR VALVE HINGE WORN THRU. REMOVED HEAT BOX ASSY AND FOUND BOX CRACKED 50 PERCENT AROUND MOUNTING FLANGE. CRACK COULD NOT BE SEEN WITH BOX ON AIRCRAFT.