As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF AND AFTER LANDING GEAR SELECTED UP, A BIG NOISE WAS HEAR ON THE RT MLG. CONFIRMED BY THE F/A. EMERGENCY DECLARED. DECISION WAS MADE TO RETURN TO DEPARTURE AND CHECK FOR POSSIBLE DAMAGE. PERFORMED VISUAL INSP RT MLG NO DAMAGE FOUND. PERFOMED MLG LUBRICATION IAW W/C EX-122232-LUB-10000-004-RT. PERFOMED NORMAL EXTENSION AND RETRACTION FUNCTIONAL TEST IAW JIC 32-31-00-FUT-10000. SYS WORKING PROPERLY AT THIS MOMENT.