As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS INFLIGHT T1752/21AUG - ON FINAL APPROACH, AIRCRAFT UNABLE TO EXTEND RIGHT MAIN GEAR. EXENDED GEAR THROUGH EMERGENCY PROCEDURE AND LANDED WITHOUT INCIDENT. FOUND FLEX LINE AT RIGHT GEAR DOWNLOCK ACTUATOR RUPTURED. REPLACED BOTH FLEX LINES. AIRCRAFT MAINTENANCE FERRIED TO JFK FOR GEAR RETRACTION CHECK. SYSTEM GROUND CHECKED NORMAL OPERATION.