As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3892, THE CREW REPORTED THAT AFTER TAKEOFF THEY HEARD A LOUD THUMPING NOISE IN THE NOSE LANDING GEAR AREA. THE CREW DECLARED AN EMERGENCY AND RETURNED TO MIA. THE AIRCRAFT LANDED SAFELY WITH NO INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE RIGHT MAIN LANDING GEAR UPLOCK BOX IAW EMB AMM 32-33-10 AND DID EXTENSION AND RETRACTION CHECKS. OPERATIONAL TESTS WERE GOOD, FCF PASSED. THE AIRCRAFT WAS RETURNED TO SERVICE.