As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO OBTAIN CLIMB THRUST ON NR 1 ENGINE. FLIGHT RETURNED TO ORD. NR 1 ENGINE OVERTEMP ON CLIMB POWER AT 1.15 EPR AND 620 DEGREES (C). RIGHT ENGINE WAS 1.23 EPR AT 590 DEGREES (C). REPLACED NR 1 ENGINE. CAUSE WAS ATTRIBUTED TO BROKEN 2.5 BLEED BELLCRANK PIVOT PIN. PART WAS PRE-SB PW4G-112-72-60. PROJECT IS UNDERWAY TO UPGRADE BLEED DESIGN TO SUBSEQUENT SB PW4G-112-72-106.