What was found
(CAN) ON APPROACH TO PENTICTION NOSE GEAR LIGHTS DID NOT ILLUMINATE. INTRANSIT LIGHT WAS EXTINGUISHED & NOSE LIGHTS DID NOT ILLUMINATE DURING PRESS TO TEST. PILOT DID FLYBY OF TOWER & ALL LOOKED GOOD. HE THEN ELECTED NOT TO LAND BUT RETURN TOCALGARY WHERE HE DID ANOTHER PASS BY THE TOWER & AS A PRECAUTION. ALSO HAD EMERGENCY SERVICES CALLED OUT. AN UNEVENTFUL LANDING WAS DONE & THE AIRCRAFT BROUGHT TO THE HANGAR WHERE THIS BULBS IN THE ANNUNICATOR WERE REPLACED P/N 327 AND GEAR SWINGS COMPLETED WITH ALL SYSTEMS OPERATING NORMALLY.