What was found
ON APPROACH AFTER GEAR EXTENSION, NOTED NO TAIL SKID LIGHT. CYCLED AT 500 FEET AGL, GOT TOO LOW GEAR ON GPWS. EXECUTED GO-AROUND. EXECUTED PROCEDURES AND CYCLED GEAR, DURING GEAR EXTENSION, TAIL SKID CAME DOWN AND LANDED NORMALLY. INSP AND TEST TAIL SKID PER M/M. FOUND WATER IN CANNON PLUG. CLEANED, OPS CHECK NORMAL. PERFORMED SELF TEST ON GPWS, NORMAL INSP AND INSPECT CHECKED LDG SYSTEM FOUND NORMAL.