What was found
APU DET INOP LIGHT ILLUMINATED INFLIGHT APU WAS OFF. DUPLICATED DEFECT FIRE DETECTION MODULE FAULTED APU TAILPIPE LOOP REPLACED IAW MM 26 15 01, GROUND VERIFICATION TESTS PASS.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
APU DET INOP LIGHT ILLUMINATED INFLIGHT APU WAS OFF. DUPLICATED DEFECT FIRE DETECTION MODULE FAULTED APU TAILPIPE LOOP REPLACED IAW MM 26 15 01, GROUND VERIFICATION TESTS PASS.