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 OVERHEATS WITH LOW OR HIGH STAGE BLEED WITH CLIMB POWER SET AND LT PACK AT MIN FLOW. CREW RETURNED TO KGSO AND LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED NR 2 PRECOOLER CONTROL VALVE PER ALL APPLICABLE MANUALS. AIRCRAFT WAS RETURNED TO SERVICE.