are the 757 centre tank trouble free?
 

On speed news Jan 19 I have see this Advertising:

"APPROVED!, TDG's UFI/Ram for Boeing 757-200 and 300 has an STC#STO1950LA which is an AMOC to AD2002-24-51.

It's Official! the UFI is the only FAA approved product available today that is an inexpensive, easy to install device offering comprehensive protection against potentially dangerous ignition source in the B757 center tank fuel system.....bla bla bla..."

www.tdgaerospace.com