As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU CT5ATP CONTINUES TO REMAIN ABOVE THE 605 DEGREE THRESHOLD. APU REPLACEMENT REQUIRED. SIGNIFICANT SYSTEM INSTALLATION TASK AFFECTS APU ON DEMAND IN-FLIGHT START CAPABILITY. UPON COMPLETION CONTACT MAINTENANCE CONTROL AND REPORT THAT THIS TASK HAS AFFECTED APU IN-FLIGHT START CAPABILITY. GROUNDED - YES. REMOVED APU AND INSTALLED SERVICEABLE APU REF TC 78349010 AND TC 78349001. OPS CHECK GOOD AND LEAK CHECK GOOD. NO DEFECTS NOTED AT THIS TIME.