As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT PERFORMED AN UNSCHEDULED LANDING DUE TO APU OUT SERVICE IN FLIGHT. MX PERFORMED A SWAP BETWEEN RT GCU AND GCU OF THE APU IAW AMM 24-20-02. DURING TRANSIT CHECK, THE CSD AND OIL COOLER OF THE RT SIDE WERE REPLACED IAW AMM 24-10-03, ALL CORRECT.