Piper J3
Well Known Member
My FlightCom 403 quit working. I removed the unit from the panel and heard something loose inside. I took off the top cover plate and discovered a nut and insulator bushing the holds a power transistor heatsink vibrated loose and fell on the circuit board. The remaining screw without its insulator allowed the power transistor to short-circuit against the metal case. The real problem is when the 403 quits working it prevents audio from the comm radio to reach the headsets.
A new (used) 403 is now on order and I will remove the top cover plate and put some adhesive on the exposed thread to prevent recurrence.
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A new (used) 403 is now on order and I will remove the top cover plate and put some adhesive on the exposed thread to prevent recurrence.
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![b8ocd0.png](/community/proxy.php?image=http%3A%2F%2Fi64.tinypic.com%2Fb8ocd0.png&hash=2defa686f9058f80ec2c0fa1bab011b0)
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![2mmxrux.png](/community/proxy.php?image=http%3A%2F%2Fi65.tinypic.com%2F2mmxrux.png&hash=4f0b8e194925f93e69db51bce8be12a7)