What was found
(CAN) THE AIRCRAFT RETURNED TO BASE AFTER COMPLETING THEIR MISSION AND THE PILOT REPORTED A SMOKY ODOR IN THE COCKPIT. IT WAS NOT AN ELECTRIC BURNING ODOR. THE ODOR WAS TRACKED DOWN TO BE COMING FROM THE HR 2 AC PHASE ADAPTOR. THERE WAS A YELLOW FLUID COMING OUT OF IT THAT SMELLED THE SAME. THE INSTRUMENTS NEVER DID LOSE POWER. THE NR 2 PHASE ADAPTOR WAS REPLACED AND GROUND FUNCTION CHECKED OK.