As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS CARGO DETECTION AIR STATUS MSG DURING CLIMB. FOUND AFT FAN 2 EXHAUST CLOGGED. REMOVED BLOCKAGE FOUND INTERMITTENT RELAY K331. REPLACED IAW AMM 26.16.21 & FWD FAN 1. OPERATIONS CHECKED GOOD, NO FURTHER DEFECTS NOTED AT THIS TIME.