As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CB M31 POPPED OUT WITH NO FURTHER INDICATIONS DF420. IDG AIR OIL COOLER DEACTIVATED IN OPEN POS SECURED TO CLOSE BY ELECTRICAL HARNESS. CB PULLED AND SECURED. REPLACED IDG AIR OIL HEAT EXCHANGER AND VLV NO LEAKS, NO FAULTS, NO MESSAGES.