What was found
ANC - AIR TURN BACK OF FLT 55, CREW REPORTED NOSE LANDING GEAR WARNING LIGHT REMAINED ILLUMINATED WITH GEAR HANDLE IN THE UP POSITION. WHEN GEAR HANDLE WAS MOVED TO THE OFF POSITION, THE NOSE GEAR EXTENDED. FOUND EMERGENCY EXTENSION CAM STUCK IN THE EXTENDED MODE. REPLACED FROZEN BEARING IN MANUAL EXTENSION RELEASE MECHANISM. SYSTEM OPERATED NORMALLY ON MANUAL EXTENSION TEST. (M)