What was found
LEVEL 1 ALERT "A-ICE SENSOR FAIL" AT FL350. STAYED ON FOR REMAINDER OF FLIGHT. IDENTIFIED PARTS, (W/KIT) PNEUMATIC PRESSURE. UPGRADED PNEU SYSTEM. CFDS SENSOR READOUT, PSC 1 SHOWED PE1 XXXX AND PSC 2 SHOWED PE1B XXXX. READINGS RETURN TO NORMAL AFTER PSC 1 AND PSC 2 RTS. SENSORS AND PSC NIS. ON ARRIVAL FOUND PSC 1 FAULT REVIEW AND CURRENT FAULT REPORTED "PE1 XXXX" AND PSC #2 FAULT REVIEW AND CURRENT FAULT REPORTED "PE1B XXXX" SENSOR READ OUTS PSC 1&2 SAME. PERFORMED CONTINUITY CHECKS WITH SHAKING OF HARNESSES FROM PSC'S TO PE1 & PE1B IAW SWPM 20-00-09 WITH NO FAULTS NOTED. R & R THE PSC NR 1, & 2 IAW MM 36-10-02-4 AND PE1, PE1B SENSORS IAW MM 36-11-05-4, ALL TESTED NORMAL.