What was found
DURING CLIMBOUT, THE FLIGHT CREW REPORTED A BLEED 1 OVERTEMP MESSAGE IN ICING CONDITIONS. THE FLIGHT CREW RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE THERMOSTAT BUT THE SYSTEM WOULD NOT PASS OPS CHECKS. UPON FURTHER VISUAL INSPECTION OF THE BLEED SYSTEMS, THE PRECOOLER WAS FOUND TO BE CRACKED, ALONG WITH DAMAGE TO THE DUCT LEADING TO THE PRECOOLER. THIS AIRCRAFT IS STILL OUT OF SERVICE WHILE A NEW PRECOOLER IS BEING LOCATED AND INSTALLED. THE FINAL CORRECTIVE ACTION WILL BE SUBMITTED AS A SUPPLEMENT TO THIS REPORT. MAINTENANCE REPLACED THE BLEED 1 PRECOOLER WITH NO FURTHER DEFECTS NOTED.