What was found
AT UNRELATED INSPECTION, TECH INSPECTED ELT IAW FAR 91.207 BY ACTIVATION OF ELT WITHIN 6 INCHES OF AM RADIO, THE RECOMMENDED PROCEDURE. THE RESULTS WERE SATISFACTORY. AN ADDITIONAL CHECK USING CALIBRATED AVIONICS TEST EQUIPMENT REVEALED A DISTORTED UNACCEPTABLE LOW OUTPUT. THE UNIT WAS RETURNED TO THE MFG FOR REPAIR/OVERHAUL.. SUBMITTER STATES THAT AS EVIDENCED BY THIS INSPECTION, THE FAA RECOMMENDED PROCEDURE FOR TESTING ELT OUTPUT MAY LEAD ONE TO A FALSE CONCLUSION AS TO THE AIRWORTHINESS OF THESE UNITS AND RECOMMENDS A CHANGE IN RECOMMENDED TEST PROCEDURES IF AN IMPROVEMENT IN RELIABILITY IS THE GOAL WITH THESE UNITS.