What was found
ON FINAL APPROACH INTO KMCO LANDING GEAR WOULD NOT EXTEND WHEN GEAR HANDLE WAS PLACED IN EXTEND POSITION. FOLLOWED QRH & PERFORMED MANUAL EXTENSION. AIRCRAFT HAS BEEN INSPECTED AND FOUND SAFE FOR INTENDED FERRY FLIGHT TO KMIA. GEARS TO REMAIN EXTENDED DOWN THROUGHOUT FLIGHT. ACTION TAKEN: REMOVED & REPLACED LANDING GEAR ELECTRO VALVE IAW AMM 32-31-12. PERFORMED NORMAL EXTENSION AND RETRACTION TEST IAW AMM 32-30-00 PG. 501. VALVE OPS & LEAK CHECKS GOOD. GEAR EXTENSION & RETRACTION TESTS GOOD.