As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) RH MAIN LANDING GEAR UPLOCK ASSEMBLY BRACKET AND SPRING MISSING.THE BRACKET IS ATTACHED TO THE RIB LOCATED IN THE RH WHEEL BAY BY THREE RIVETS AND IT APPEARS THAT THE RIVETS FAILED PROBABLY DUE TO AGE HARDENING. LANDING GEAR COLLAPSED ON TOUCHDOWN.