As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB FROM KGSO TO KTOL NR 2 ENGINE PNEUMATIC SYSTEM OVERHEATED WITH LOW OR HIGH STAGE BLEED AND PACK FLOW AT MIN. CREW RETURNED TO KGSO AND LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED NR 2 PRECOOLER PER ALL APPLICABLE MANUALS. AIRCRAFT RETURNED TO SERVICE.