What was found
CLIMBING OUT IN ICING CONDITIONS ICE DETECT ILLUMINATED. TURNED ON ALL ICING EQUIPMENT THEN ICE DETECT FAIL CAUTION LIGHT ILLUMINATED- COMPLIED WITH EA CHECKLIST & NOTIFIED MAINTENANCE. REMOVED FROM SERVICE. BOTH ICE DETECTORS PLACED ON MEL 30-80-2(B). REF AMM 30-80-710-801 PERFORMED OPS CHECK OF ICE DETECTION SYSTEM. OPS CHECK GOOD. REPERFORMED OPS CHECK OF ICE DETECTION SYSTEM WHILE APPLYING FREEZING AGENT TO ICE DETECTOR PROBES. OPS CHECK GOOD. AS A PRECAUTION R&R #2 ICE DETECT PROBE, REF AMM 30-80-01-000-801 AND 30-80-01-400-801. OPS CHECK GOOD. BONDING CHECK GOOD. THIS CLEARS MEL. NOTE: COULD NOT DUPLICATE ICE DETECT FAIL. RETURNED TO SERVICE.