What was found
AFTER TAKE OFF, NLG DOORS FAILED TO CLOSE AFTER L/G RETRACTION, RESULTING IN AIR TURNBACK. TROUBLESHOOTING REVEALED NO ISSUES, HOWEVER, DUE TO HISTORY, AIRLINE (TOMC) ELECETD TO FERRY FLIGHT BACK TO HOME BASE. PERFORMED FIM TASK 32-30-F1-05A-421A, NOSE L/G DOOR CONTROL VALVE MODULE INSTALLATION TEST I.A.W AMM 32-34-03-00A-720A, NOSE GEAR DOOR CLOSED INDICATION PROXIMITY SENSOR FUNCTIONAL TEST I.A.W AMM 32-61-03-00A-340A, NOSE LANDING GEAR HYDRAULICPRESSURE TRANSDUCER INSTALLATION TEST I.A.W AMM 32-31-19-00A-720A. FAULT REMAINS ''NOT ACTIVE''.