What was found
THE ELT WAS BROUGHT IN TO OUR FACILITY FOR TESTING, AFTER A MECHANIC NOTED THAT IT FAILED ROUTINE TEST, NO MODULATION. BENCH TESTING REVEALED THAT THIS UNIT WAS OPERATING AT A FREQUENCY OF 143.005 MHZ, WELL OUTSIDE OF ITS SPECIFICATION AND HAD NO MODULATION. THE UNIT DISABLED. THE CUSTOMER WAS ADVISED THAT THIS UNIT IS THE SUBJECT OF AN UNAPPROVED PARTS NOTIFICATION/AD AND THAT IT CANNOT BE REPLACED WITH AN IDENTICAL, FUNCTIONAL MODEL.