What was found
PHL/GHM - FLT 5760 - ON APPROACH TO BHM, THE LANDING GEAR WOULD NOT EXTEND. THE CREW MANUALLY EXTENDED THE GEAR. NO EMERGENCY WAS DECLARED, HOWEVER, THE TRUCKS WERE DISPATCHED. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE PERFORMED SEVERAL GEAR RETRACTIONS, BUT COULD NOT DUPLICATE THE PROBLEM. THEY REMOVED AND REPLACED THE PSEU AS A PRECAUTIONARY MEASURE THEN TEST FLEW THE AIRCRAFT. OPS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE. (X)