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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
Read from the scan by GLM-OCR; expect the odd misread word.
December 1966. On 19 December 66, A Flight had some of it's LFs shutdown (A-6, A-7, and A-10). The similarity between the two flights was: The same Capsule crew, adverse weather conditions, and commercial power failure after the facilities shutdown. Since weather condition and Capsule crew have been eliminated as causes of the incident, investigation of electrical failure was started. (U) The power outage that affected E-1 at 1453 on 16 March 67, occurred on the 7.2/12.5 kilo volts (KV) transmission line from the Winifred Substation. Fergus Electric Co. (Mr. D. Young, Lewistown) advised Mr. H. Jackson that a transformer shorted one phase of the three south of Winifred. (U) Sites Echo 1-6 and E-9, E-10, and E-11 are supplied by 7.2 KV line from the Winifred substation. No sites in other flights are supplied power from Winifred. Sites E-7, E-8, D-6, D-7, M-2, M-3, and M-8 are supplied power by 7.2 KV lines from the Hilger substation. (U) (SEE DIAGRAMS) The source of power comes from the Rainbow generating plant in Great Falls and is fed through the Rainbow switchboard on 100 KV power lines to the Stanford substation. The 100 KV lines continue to Benchland where it feeds two 50 KV lines. One goes
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