{TAIL ~ A bolt attachment} is attached to the outer surface of the fan case and has a composite boss with {HEAD ~ at least one threaded metallic insert} 
{ TAIL ~ A bolt attachment } is attached to the outer surface of the fan case and has a composite boss with { HEAD ~ at least one threaded metallic insert }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD