Page:CAB Accident Report, United Airlines Flight 16.pdf/15

 - 13 - report for Salt Lake City was probably available and, in addition, a nuber of special reports which had been filed between the regülar 12:35 a.. and; 1:35 a.a. sequences. These reports showed light to moderate snow' at Salt Lake - City with extremely variable ceiling and visibility. At 12:50a.m., Salt Lake reported a snow ceiling of 500 feet and visibility 1/2 aile, at
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snow ceiling of 1000 feet and visibility of 2 miles, at 1:02 a snow ceiling of 500 feet and visibility of 1/2 mile, at 1:20 a snow ceiling of 1000 feet and visibility of 3 miles, and at 1:35 a snow ceiling of 1000 feet and visi- bility of 3 miles, These reports indicated that there was little wind on the ground at Salt Lake City. The remainder of the history of Trip 16 from the time it departed Elko tin teacher at 2:32 a,n. until it crashed at 4:42 a, t. must be gathered, for the post part, from the radio log* showing the contacts made between the flight crew of Trip 16 and United ground stations and the card taken from the flight re- corder** installed in the tail of the airplane. The log shows that at 2:53 an., the Airway Traffic Control Center at Salt Lake City cleared Trip 16 from Wendover to the Salt Lake City Airport control tower and designated the trip as No. 1 to approach, From that time until 3:20 a.m., 'United's Salt are contained in Appendix B. which may be secured, if desired; upon re- quest direct to the Public Infornation Section, Civil Aeronautics Board, Washington, D, C. altitudes at which the airplane flies, the tities at which a radio trans- mitter is used, and the periods during which the automatic pilot is being used, Salt Lake City were such that Trip 16 would be able to begin an approach Irinediately upon arrival over the Salt Lake City station and would not have to await the completion of an approach and landing by any other air- Craft.
 * Radio logs showing communications pertaining to Trip 16 and other flights
 * An instrurient designed and used to make a continuous record of the various
 * See footnote page 12. This clearance indicated that traffic conditions at