What was found
STAB MISCOMPARE AND HYD PRESS LIGHT CAME ON OUT OF APPROX 3000 FT WITH THE GEAR UP AND FLAPS UP SPEED APPROX 220 KTS. RAN CHECKLIST . PULLED HYD CONTROL CB. HYD CONTROL CB. HYD PRESS WENT OUT. CONFIGURED FOR LANDING . WITH FLAPS 15 STAB MISCOMP WENT OUT. PERFORMED TWO-PISTON HORIZONTAL STAB OPERATIONAL CHECK. PERFORMED AIRSPEED SWITCH AND HORIZONTAL STAB OPERATIONAL CHECK. NO DEFECTS NOTED. ALL WORK PERFORMED IAW CESSNA CITATION 560XL MM 27-40-00.