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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
ATTACHMENT A FECP 528 Page 4
MINUTEMAN FACILITY CHANGE INITIATION REQUEST
MCL NO. 2827 DATE FECP NO. 528
(FOR BSSQ USE ONLY)
ORIGINATOR AND SERIAL NO. $\textcircled{1}$ DATE PREPARED $\textcircled{1}$ NEED DATE $\textcircled{1}$ INTERFACE AFFECTED $\textcircled{1}$
Boeing 720 31 Oct. 1966 15 Aug. 1967 YES X NO
SUBJECT $\textcircled{3}$
DC Supply for Isolation Relays - VRSA Channels 26 and 27 (LF)
DESCRIPTION OF CHANGE (USE ADDITIONAL SHEETS IF REQUIRED) $\textcircled{6}$
(ATTACH DWG'S AND SKETCHES)
Provide DC supply for the isolation relays being installed in VRSA channels 26 and 27 per ECP 1141. A typical DC supply circuit for these relays is shown on Sketch 1.
JUSTIFICATION (USE ADDITIONAL SHEETS IF REQUIRED) $\textcircled{7}$
The isolation relays are being installed in VRSA channels 26 and 27 per ECP 1141. The DC power required for these relays is to be supplied from the RPIE power system. This FCIR initiates the required RPIE change.
ESTIMATED COST $\textcircled{8}$ 4 ME at $11 = $44
Mat'l = 1
TOTAL = $45
DOCUMENTS AFFECTED $\textcircled{9}$ RECOMMENDED EFFECTIVITY: $\textcircled{9}$
BASE CONSTR. PHASE
Wing I All LFs
Wing II All LFs
Wing III All LFs
Wing V All LFs
VAFB All W133A LFs
HETF W133A LF
FIG. A AND FORM C Fig. A 1377 and 1329 WING IV All LFs
OTHER ICMGA 8026
$ \mathrm {H} _ {2} \mathrm {O} _ {2} $ $ \mathrm {B} _ {2} \mathrm {H} _ {5} $ 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.