What was found
WILL NOT CHANGE FROM STANDBY TO IN USE AND VERY HARD TO CHANGE FREQUENCY FOR FIRST 20 TO 30 MINUTES OF FLIGHT. PERFORMED PRELIMINARY INSPECTION AND TESTED. ADJUSTED MIC GAIN AND SIDETONE. BENCH CHECK GOOD. COULD NOT DUPLICATE PROBLEM.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WILL NOT CHANGE FROM STANDBY TO IN USE AND VERY HARD TO CHANGE FREQUENCY FOR FIRST 20 TO 30 MINUTES OF FLIGHT. PERFORMED PRELIMINARY INSPECTION AND TESTED. ADJUSTED MIC GAIN AND SIDETONE. BENCH CHECK GOOD. COULD NOT DUPLICATE PROBLEM.