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This Black Vault release contains the Air Force's 2001 response from the 341st Space Wing FOIA office at Malmstrom AFB, Montana, to a request about the 16 March 1967 Echo Flight missile shutdown, with excerpts from 341st Strategic Missile Wing histories covering 1967 to early 1968. The histories say all ten Echo Flight launch facilities lost strategic alert almost simultaneously. Investigators could not find a logical cause and found rumors of UFOs near Echo Flight to be unfounded.
“Headquarters”14 pages
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but usually if the G&C is off power for any period of time, it will not restart when power is returned by a maintenance team. 133 The dash 9 and dash 20 missile problem in the 564th SMS had been alleviated this quarter. Since almost all the dash 9 and dash 20 missiles were removed prior to this quarter. (U) MISSILE ACCIDENTS/INCIDENTS There were no missile accidents or incidents during this quarter, but testing on the Echo Flight Incident was accomplished during this time interval. Testing on Echo Flight, because of it's relationship to this section will be included in this section. (U) ## MISSILE INCIDENTS-Echo Flight Testing Testing on the problems associated with Echo Flight are still be conducted by higher headquarters and the contractors. The results of all these tests are not known as yet. Next will be the presentation of test results that are known and their affects. (U) As stated in the last history, a No-Go Mode effect had to be reproduced in order to study the problem. This was achieved by the use of a 30 micro sec Pulse (-10 to 0 volt square wave) placed on Self Test Command (STC) line at the C-53P Coupler
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