Originally posted by Hand87_5
As far as I remember some 727 freighter use hushkits aswell.
I guess that UPS , DHL and FedEX use some of them.
Am i correct?
Yes they do, in fact FedEx invented them. AA, DL, and UA 727’s also used FedEX hushkits prior to being retired. In fact, UA was basically trading in their DC-10-10’s to FedEX in exchange for 2 sets of hush-kits per Douglas.