ST. LOUIS, Oct. 25, 2005 -- Boeing [NYSE: BA] is installing the first radio frequency (RF) cables in the EA-1 aircraft as it continues production of the first two EA-18G flight test aircraft, EA-1 & EA-2.
RF cabling is essential in connecting the specialized avionics required to perform the airborne electronic attack mission of the EA-18G. When completed, each aircraft will have more than 2,500 feet of RF cabling, about five times the amount installed in the F/A-18E/F Super Hornet, which shares a common airframe with the EA-18G.
"We're right on schedule with the modifications," says Bob Feldmann, EA-18G program manager for Boeing. "Every day, we move closer to our goal of flying this aircraft, and demonstrating its incredible capabilities for our Navy customer."
The cabling runs throughout the entire aircraft and takes special care to install. Cables range in length from 30 to 270 inches, requiring additional time for the installation process, according to Darryl Lyons, the supervisor in the St. Louis modification shop where the work is being completed.
To ensure quality, the cable is tripled-checked, initially by the supplier, then checked after forward fuselage installation, and finally at the aircraft level. Cable installation is one part of the modification of EA-1 and EA-2 scheduled for first flight in September and November 2006, respectively.
From the Boeing website
Not definitive but it does illustrate my point, the EA mod is more than a few extra looms added to a -F model airframe. The cabling mentioned is only the RF cabling as well, you would also require cabling to power the systems, video lines and mux looms for communication between MC's and EA systems . I can't see the point of incurring the cost of installing looms you may never use and the weight penalty it would also incur.
Having that amount of cabling sitting idle in the airframe also creates problems with electromagnetic enviromental effects. Aircraft involved in a lightning event could have the lightning use those looms as a "path of least resistance" instead of the designed lightning path. Aircraft involved in events like this suffer major damage when the lightning reaches the end of the loom and has not got a path to dissipate further. Usually ends with a hole in the aircraft.
Thats my story anyway, and I am sticking to it!