What was found
AFTER TAKEOFF CLIMBING THRU 1000' WITH ENGINE AND WING ANTI-ICE ON THE NR 3 MANIFOLD FAIL LIGHT CAME ON. REMAINED OUT OF ICING. LANDED AT NEAREST SUITABLE AIRFIELD, KSTL. RT WING PRESSURE SWITCH FAULTED IN CAC. DROPPED FLAPS/SLATS AND CHECKED WING ANTI-ICE LINES FOR LEAKS, NONE NOTED. CHECKED FWD CARGO AREA FOR LEAKS, NONE DETECTED. PERFORMED NR 3 SYSTEM DECAY CHECK IAW DC-10 JRH, TEST PASSED. DUE TO PREVIOUS REPORT OF 60 PSIG AND NORMAL DECAY CHECK, CHANGING HIGH PRESSURE BLEED CONTROL VALVE, PRESSURE REGULATING VALVE, RIGHT WING ANTI-ICE VALVE, MANIFOLD FAIL CONTROLLER AND PNEUMATIC CHECK VALVE.