As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5953 - PHL TO CLE - THE CREW RECEIVED A BLEED 1 LEAK MESSAGE DURING CLIMB, RAN THE APPROPRIATE QRH CHECKLISTS AND LANDED BACK AT PHL WITHOUT INCIDENT. MAINTENANCE INSPECTED THE NR 1 BLEED SYSTEM AND COULD FIND NO LEAKS. MAINTENANCE RAN THE ENGINES AND BLEED SYSTEM WITH THE CREW AND THE BLEED LEAK COULD NOT BE DUPLICATED. THE AIRCRAFT WAS THEN RELEASED BACK TO SERVICE.