As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AIRCRAFT 800 HOUR/ 36 MONTH INSPECTION A CRACK WAS DISCOVERED ON THE MAIN TRANSMISSION DECK AT APPROXIMATELY AIRFRAME STATION 4000, AT FORWARD RIGHT MAIN TRANSMISSION TORQUE STRUT MOUNT. UPON FURTHER INSPECTION INTO THE CRACK IT WAS DISCOVERED THAT ON THE UNDERSIDE THE DECK DOUBLER (RIB) WAS ALSO CRACKED AT SAME LOCATION.