What was found
IND- FLT 468 - GEAR DOOR LIGHT REMAINED ON FOR ABOUT ONE MINUTE AFTER GEAR RETRACTION. OPEN DOOR NOISE WAS AUDIBLE. NO EICAS MSG. AFTER ONE MINUTE LIGHT OUT AND NO GEAR NOISE. NLG DOOR LOCK RELEASE ACT HYD LINES INSTALLED BACKWARDS. REPOSITIONED LINES AND REPLACED ACT IAW 32-35-22. AIRCRAFT ADDED TO OPS SPEC 10/95, BOEING MANUFACTURE NOTIFIED OF POSSIBLE INSTALLATION ERROR AT FACTORY.