What was found
AIR DIVERSION, RED APU FIRE CAS POSTED IN FLIGHT AT FL180. REPLACED BOTH FORWARD APU FIRE LOOPS AND BOTH AFT SENSE ELEMENTS. OPS CHECKED GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIR DIVERSION, RED APU FIRE CAS POSTED IN FLIGHT AT FL180. REPLACED BOTH FORWARD APU FIRE LOOPS AND BOTH AFT SENSE ELEMENTS. OPS CHECKED GOOD.