Integrated Avionics Systems (heavy)?

The tech school was 6 months of basic electronics, then 6 months of various airborne radar and inertial nav systems. The school took people who couldn't spell electronics and taught them everything from battery and resistor circuits to wave guide theory. Additional systems were taught later on at bases I was assigned to. The job consisted of troubleshooting write ups on aircraft, pulling black boxes off of aircraft, take them into the shop and repair the electronics within them. Some people specialized on pulling black boxes, some like I specialized on repairing the electronics inside the black boxes back in the shop. The work was extremely interesting and challenging. When I got out, I had a solid 4 yr notch in troubleshooting electronics on my resume. That kept me very well employed in electronics jobs.