Our airline, which is an all 737 operator, took the creative route. With an approved engineering order, our I/C – R/T switch located on the RCP is no longer spring loaded in either position. The I/C position is not toggled, while the R/T is still spring loaded. With that being said, we no longer have to worry about the rubber band becoming extinct.
The Telex 450 ANR system is very nice and light weight too.