As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT AFT MAIN LANDING GEAR BOLT BROKE. THIS IS ONE OF TWO OUTBOARD MOUNT BOLTS THIS BOLT WAS INSTALLED NEW 10/03/2018 AND HAD 2764.6 TTSN THE BOLT BROKE IN THE THREADED AREA. THE PILOTS CANNOT SEE THE BOLTS DURING THE PRE-FLIGHT INSPECTION AND CAN MAKE HUNDREDS OF LANDING WITH THE BOLT BROKEN UNTIL MAINTENANCE FINDS IT DURING THE NEXT 100HR INSPECTION