As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISPLAY WILL NOT DIM. REPLACED PHOTOCELL RT1. REPAIRED. ALSO REPLACED INTERMITTENT THUMBWHEEL ASSY. FOUND WITH TRANSMITTER MANUAL/GD SWITCH TO GD, AND TRYING TO LOAD A FREQUENCY INTO THE RECEIVE PRESET POSITION, DISPLAY WOULD BLANK. FOUND SOLDER BRIDGE ON PINS OFSELECTOR SWITCH S2. REMOVED SOLDER BRIDGE. REPAIRED PROBLEM. BENCH CHECK GOOD.