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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.
“Seattle”11 pages
ANALYSIS REVISION NOTICE CONTRACTOR: The Boeing Company ANNULATION VMA-33 ORIGINATOR: C. Wenger SUBMITTAL DATE: 4-7-66 INTEGRITY: VAFB-LF-05 & LF-08 CONTRACTOR APPROVED: W. A. Shook BSD'S APPROVAL: ICP REF NO: 1141 VIRTUAL TITLE: OGE System Specification S-133-11 Modernized VAFB Supp. D2-16119-1 SCCI. PAGE: 150 FORM / DWG TITLE: Fig. A 1377MV, Rev. B dated 8-3-65 Interconnecting Boxes NO. 1377MV SHT NO: 1 ACTION AND REASON Approval of this change will result in a change to the Figure A revision code. ACTION 1. Add the following technical requirement to paragraph I. B. "VRSA monitor lines for equipment in the Launcher Support Building require a means to prevent equipment damage to the Programmer Group (Figure A 1201) from overvoltages up to 2000 volts:" 2. Add the following recommended solution to Part II: "Isolation relays will be provided in the monitor lines for VRSA channels 26 and 27 to prevent equipment damage to the Programmer Group (Figure A 1201) due to overvoltages below 2000 volts." REASON OOAMA/OONEO letter dated Feb. 11, 1966, directed that an ECP be submitted. The ECP is to prevent Launch Facility vulnerability from the support building. VRSA channels 26 and 27 are used to monitor equipment in the support building and overvoltage protection is not presently provided for overvoltages under 2000 volts.
Document, cited by the archive. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 88 pages are in the text index: search them above, or from the library's search.