As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: DURING CLIMB LEFT BLEED TRIP OFF ANNUNCIATOR ILLUMINATED, LEFT BLEED TRIP OFF ANNUNCIATOR REMAINED ILLUMINATED AFTER QRH. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT ORD. (OPEN).