What was found
DURING SCHEDULED 5-YEAR REPLACEMENT NOTED LT ENGINE FUEL FILTER TO FUEL HEATER HOSE ASSY. APPEARED TO HAVE EXCESSIVE LENGTH, POOR ROUTING THAT CUSED HOSE ASSY. TO RIDE AND CHAFE ON ADJACENT ENGINE COMPARTMENT COMPONENTS. INSTALLED HOSE ASSY. WAS FOUND TO BE A P/N 3330997F10-0230 HOSE ASSY. THE IPC CALLS OUT A P/N 330997F10-210 HOSE ASSY. FOR THIS APPLICATION. NO RECORD OF REPLACEMENT SINCE MANUFACTURE. SUSPECT INCORRECT HOSE ASSY. INSTALLED AT AIRCRAFT BUILD. RECOMMEND MANUFACTURER INVESTIGATE IF THIS WAS A 1-TIME OCCURENCE, OR IF INCORRECT P/N HOSE ASSY'S. WERE BEING INSTALLED ON OTHER ACFT.