The push to talk switch still worked but was requiring a bit more deliberate squeeze to transmit. Probably the victim of abuse from of an occasionally white knuckled test pilot.
The pilot's control stick was pulled apart to access the push to talk switch. Tosten had mailed me instructions and a replacement circuit board with two switches on it. Unfortunately, after popping the stick apart it was found that the circuit board didn't match my model, but the switches on the circuit boards were very similar.
The old button was unsoldered. One of the good switches was unsoldered from the new board and replaced the old switch, then contacts were checked to ensure operation wasn't affected after being soldered back.
Reassembly is a bit of a challenge because the PTT trigger spring easily comes loose if the trigger moves when the switch halves are mated back together. There were multiple lengths of screws holding the stick halves together so I made a mental note which ones went where and managed to get them back where they belonged.
The stick was reinstalled then tested.
New charts were out so the memory cards were updated.
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