As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AEROQUIP FC 300-04 HOSE MEETING SAE 100R5-23 WAS FOUND INSTALLED IN REAR ENGINE FUEL SYSTEM. THIS HOSE IS INDUSTRIAL AIR BRAKE HOSE AND THE END FITTINGS MAY NOT BE COMPATIBLE WITH AN/MS FITTINGS. SUBMITTER STATES THIS IS THE SECOND HOSE OF THIS TYPE FOUND ON AN A/C.