This action prevents {TAIL ~ a decrease} in engine performance in that it provides {HEAD ~ better fuel distribution} at the higher bypass ratios 
This action prevents { TAIL ~ a decrease } in engine performance in that it provides { HEAD ~ better fuel distribution } at the higher bypass ratios
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH