What was found
FLT#861, BOS- SJU. (AIRCRAFT PERFORMED AN AIR TURN BACK TO BOS) 'DURING T/O AFTER RAISING THE GEAR HANDLE GREEN HYD QUANTITY WAS LOST. GEAR EXTENDED SUCCESSFULLY BUT GEAR DOOR REMAINED OPENED. A/S WAS NEVER GREATER THAN 180 KTS; REF DEFECT 4239430 ITEM 2 (WITH NO LOAD 15 REPORT GENERATED AND NO HARD LANDING REPORTED BY FLIGHT CREW, NO MAINTENANCE ACTION REQUIRED.), 4239431 ITEM 2 (WITH NO LOAD 15 REPORT GENERATED AND NO HARD LANDING REPORTED BY FLIGHT CREW, NO MAINTENANCE ACTION REQUIRED.), 4239433 ITEM 2 (REPLACED ENG #1 ENG DRIVEN HYDRO PUMP IAW AMM 29-11-51. LEAK CHECK DUE, SEE DEFECT 4239436 ITEM 1) , 4239435 ITEM 1 AND 2 (PERFORMED OPS & LEAK CHECK OF GEAR EXTENSION / RETRACTION IAW AMM 32-31-00 ALL OPS NORMAL & NO LEAKS NOTED AT THIS TIME ) , 4239436 ITEM 1 (REPLACED FILTER ELEMENT IAW AMM 29-11-43. LEAK CHECK DUE. SEE DEFECT 4239436 ITEM 1) & 2 (PERFORMED LEAK CHECK OF #1 ENGINE DRIVEN PUMP AND CASE DRAIN FILTER HOUSING IAW AMM 29-11-00. NO LEAKS NOTED AT THIS TIME.), AND 4239438 ITEM 1 (BLEED GREEN EDP IAW AMM 29-11-51) FOR CORRECTIVE ACTION.