Page:CAB Accident Report, United Airlines Flight 16.pdf/26

 24. work was done on the range and in mid-December the patrol pilot under the Administrator in the Civil Aeronautics Authority roported the courses to be properly aligned and satisfactory so far as course definition, signal strength, and effective voice modulation were concerned. Numorous multiples* spore found on the east and west legs and mild key clicks** were also reported on these legs. However, about December 15, 1938, shortly after the patrol pilotis: flight check, a United pilot, after a special flight check in the vicinity of the station, reported that the courses had become indefinite and confus ing Another fiight check was mad by the patrol pilot and it was his opinion that the range was still operating properly. Those fliert checks and discussions led to the calling of a conference at Salt Lake City at which representatives of the Civil Aeronautics Authority, the air carriers operating in and out of Salt Lake City, and their pilots were present for the purpose of making a further study of the operation of the station. The conference resulted, insofar as the air carriers and the ir pilots were concerned, in the conclusions expressed in their letter of January 9, 1939, addressed to the Civil Aeronautics Authority at Washington, D. c., the pertinent parts of which are as follows: a radio range but in which on course signals are received.. These multi- ples might be termed false courses. signals.
 * Multiples are areas which exist at points other than on the courses of
 * Key clicks sure abnormal clicking noises which accompany the radio range