As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU REPORTS SHOW A RAPID RISE IN CT5ATP TEMP AND HAS SURPASSED THE 605 DEGREE THRESHOLD. GROUNDED - YES. REMOVED AND REPLACED APU FUEL NOZZLES REF B737-800 AMM 49-31-14-400-801. OPS & LEAK CHECK GOOD REF AMM 49-31-14-400-801 STEP 3.H(3) TO END.