As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - FLT 5252 - DURING DESCENT, THE LANDING GEAR WOULD NOT EXTEND WHEN SELECTED DOWN. CREW USED EMERGENCY EXTENSION TO LOWER GEAR. MAINTENANCE REMOVED AND REPLACED THE LANDING GEAR SELECTOR VALVE IAW MM 32-31-51. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)