As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THRU 16,000 LWR AFT BODY OVERHEAT LIGHT CAME ON. CLOSED NR 1 BLD AND LT PACK, WENT TO IDLE PWR ON NR 1 ENG. RAN BOTH PACK WITH APU AND WITH NR 1 AND 3 ENG, COULDN'T DUP. CK TEMP GUN FOR HOT SPOT, NONE FOUND. LEAK CHK GOOD AT HIGH POWER CW (144405).