Page:CAB Accident Report, United Airlines Flight 16.pdf/117

 - 114 - was functioning abnormally; and, during the nerind tetween 4:40 and 4:50, the north course had swing so far to the east es to destroy its usefulness for purposes of let-down-through procedure. (20) The malfur.ctioning of the Salt Lake range resulted from the effect of, atmospheric conditions uron some defective component of the range equipment. (21) The monitoring system provided by the Civil Aeronautics Admini- stration to detect any malfunctioning of the Salt Lake range consists of five receivers; one at Tintic, south of Salt Lake City; one at Wercover, west of Salt Lace City; one at Plymouth, north of Salt Lake City; one in the south- west quadrant of the Salt Lake range at the Salt Lake Communications Station; and one located on the rorth log of the Salt Lake range and prerated by re- mote control from the Salt Lace Communications Station.. (22) The Salt Lake radio range was malfunctioning to such an extert during the early morning of Novem er 4, 19:40, that the monitoring onerators at Salt Lake City, Flynouth, and Tintic, notwithstanding intermittent heavy static, coul, by the exercise of reas nable diligence, have detected such malfunctionirs ir time to have permitted the issuance of a general warning prior to the accidert since the United ground station was able to contact Captain Fey as late as 4:41 a.n. (23) The malfunctioning of the Salt Lake City rance was not detected by the monitoring operators at Salt Lake City, Plymouth, and Tintic, until 5:37.6:46, end 7:03 2. respectively.