As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN FLIGHT APU START SCHEDULED BY MAINTENANCE. APU IN FLIGHT START UNSUCCESSFUL. ON GROUND INSPECTION OF APU INLET PLENUM FOUND DEBRIS ON INLET SCREEN. DEBRIS REMOVED. INSPECTION OF CHIP DETECTORS OK. LEAK CHECK OK. APU OPS CHECK OK. (M)