As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT NR3713 THE CREW REPORTED A NR 1 BLEED LEAK AFTER TAKEOFF. THE AIRCRAFT RETURNED AND LANDED WITHOUT FURTHER INCIDENT.MAINTENANCE INSPECTED AND FOUND THE NR 1 ENGINE BLEED AIR TUBE ASSEMBLY CRACKED. MAINTENANCE REPLACED THE NR 1 BLEED TUBE ASSEMBLY. OPERATIONAL CHECKS WERE GOOD.