What was found
NR 1 BLEED HOT CAUTION ILLUMINATED. COMPLIED WITH E/C. LIGHT LLUMINATED AGAIN. CDS SHOWS FAULT CODE LT BLEED OVERTEMP, STATUS MESSAGE IN FAULT HISTORY. COMPLIED WITH FIM 36-10-00-810-852. AIRCRAFT PASSED THE OPERATIONAL TEST OF THE BLEED AIR SYSTEM IAW AMM 36-11-00-710-802 AND NO FAULT CODES POSTED IN CDS. REMOVED AND REPLACED THE LT RTD SENSOR IAW AMM 36-11-16-000-802 AND 36-11-16-400-802, OPS CHECKED GOOD. NR 1 BLEED HOT CAUTION DID NOT ILLUMINATE. RETURNED TO SERVICE.