What was found
RIGHT MLG DID NOT EXTEND DURING NORMAL EXTENSION. GEAR EXTENDED TO DOWN & LOCKED WITH MANUAL EXTENSION. FREE FALL EXTENSION SYS RETURNED TO NORMAL CONDITION IAW AMM 32-33-00-2. INSPECTED MAIN LG DOOR & WW AREA & NO DEFECT FOUND. JACKED UP ACFT IAW AMM 07-11-00-00. CARRIED OUT LG NORMAL EXTENSION & RETRACTION OPERATIONS TEST IAW AMM32-31-00-05. FOUND RT MLG DOOR OPERATION NORMAL, BUT GEAR DID NOT RETRACT. R & R RT MLG SEQUENCE VLV IAW AMM 32-31-37-04. LEAK CHECKED & FOUND NO HYD LEAKAGE. PERFORMED LG NORMAL EXTENSION & RETRACTION OPERATIONS TEST. ALL INDICATION & OPERATION CHECKED NORMAL IAW AMM 32-31-00-05. LOWERED ACFT IAW AMM 07-11-00-00.