Here’s an older reference, sent to me by Emma, from an episode of 21 Jump Street, which was one of the earliest shows broadcast by FOX (it premiered in April of 1987). This particular reference took place during the March 19th, 1989 episode between two characters:
Hanson and Penhall are attempting to apprehend a young soldier hiding out in a high school. As they watch him fool about, Penhall remarks “They would have let him out of the army with a section 8… It’s that thing Klinger was always trying to get.”
I have updated M*A*S*H References on Television with this latest reference.