What was found
REMOVED FOR A FUEL PUMP BYPASS CHECK DUE TO DELAYED LIGHT-OFFS ON A C20F ENGINE. UNION WAS FOUND CRACKED AFTER LOOSENING B-NUT. BYPASS CHECK COMPLETED AND CHECK PASSED, STILL HAD NO RESOLVE TO DELAYED LIGHT-OFFS. INSTALLED UNION AND FUEL TUBE ASSEMBLY AND TIGHTENED B-NUT, THE INSIDE FLARE BROKE-OFF WITH B-NUT. AFTER INSPECTING THE UNION, SIGNS OF FRETTING WERE PRESENT AND THERE WAS A CRACK PRIOR TO IT FAILING. REPLACED UNION WITH NEW ONE. THE DELAYED LIGHT-OFFS PROBLEM WAS CORRECTED.