What was found
BLEED 1 FAIL YELLOW CAS ILLUMINATED, CLIMBING THROUGH APPROXIMATELY 16,000 FT IN ICING CONDITIONS WITH WING AND ENGINE ANTI-ICE SWITCHES SELECTED ON. AFFECTED BLEED FAIL CONDITION DID NOT INITIALLY RESET. BLEED 2 FAIL YELLOW CAS MESSAGE ILLUMINATED CLIMBING THROUGH APPROXIMATELY 16,000 FEET. COMPLIED WITH SERVICE LETTER SL 505-36-0003 AND FOUND THE PRECOOLER INTERNAL VANES BROKEN OFF AND BLOCKING AIR FLOW. R & R THE PRECOOLER WITH OVERHAULED UNIT AND OPS CHECKED GOOD IAW AMM 36-11-05-000-801-A/400, 36-11-05-400-801-A/400, 36-00-00-710-801-A/500.