As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT OF ATL NR 1 PACK RUNNING ABOUT 40 DEGREES C HOTTER THAN PACKS 2 AND 3. NR 1 PACK WAS CYCLING ON AND OFF WITH A FLOW LIGHT. WENT TO MANUAL AND SECURED NR 1 PACK. CFDS FAULTS NR 1 PACK FLOW CONTROL VALVE. REPLACED SAME. LEAK AND OPS CHECK OK. RAN ACC1 RTS. RTS PASSED.