As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF THE CREW REPORTED A BLEED 1 LEAK INDICATION AND RETURNED TO FIELD WHERE THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE DUCT GOING TO THE PACK VALVE CRACKED. THE DUCT WAS REPLACED AND NO FURTHER LEAKS WERE FOUND.