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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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the deputy commander was turned away from the console to brief the commander who had just been awakened from sleep. The commander was the first to see the faults. 74
Channel 50 data was extracted from sites E-7 and E-8 immediately after the shutdown of the entire flight. Analysis of this data determined that both sites were shutdown as a result of external influence to the G&C, no No-Go's were deltected by the G&C. Although E-8 had indications of a previous Monitor check No-Go it was not the cause of shutdown at this time. This was determined by information contained in sector 54 which said that subsequent to the last No-Go the G&C had completed an iteration routine which is performed approximately 2 hours and 30 minutes into a restart. Had a G&C No-Go caused this shutdown, the Discrete Input "A" (DIA) word would have been placed in this sector. $ ^{75} $ (U)
On Sunday, 19 March 67, a team was dispatched to sites E-2 and E-9 to dump channel 50 data. These two sites were in strategic alert at this time but were selected because they had never experienced a restart since the last time that a maintenance tape had been used. Information from the No-Go sectors of channel 50 indicated that these G&C's had never entered a No-Go loop at any time. This hardens the case against a No-Go causing a shutdown of the flight. If a No-Go had shutdown the flight, it would have Document, cited by the archive. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 88 pages are in the text index: search them above, or from the library's search.