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Declassified 341st SMW unit histories

USAF via The Black Vault · 88 pages · text by OCR

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.

  • p. 26 …THE TASK GROUP WILL CONVENE AT BOEING, SEATTLE ON 4 APRIL TO DEVELOP A TEST PLAN…
  • p. 28 …19 C-208 RUNNBAA/AFPRO BOEING CO SEATTLE WASH RUWJABA/BSD NORTON AFB CALIF BT 9…
  • p. 29 …APB MONT RUWMDAA/APPRO THE BOEING CO SEATTLE WASH RUWJABA/BSD NORTON AFB CALIF C GONE…
  • p. 33 …The group was to reconvene at Boeings' Seattle plant on 4 April 67 for development of…
  • p. 42 …DURING TESTING AT BOEING, SEATTLE. A 30 MICRO SECOND PULSE TO 10 TORG VOLT SQUARE WAVE…
  • p. 44 …BOX 1915 - SEATTLE, WASH. 9824 (BOE 720) ENGINEERING CHANGE PROPOSAL FACILITY DATE 27 December 1966 1…
  • p. 68 …BROADWAY SEATTLE 24, WASHINGTON ENGINEERING CHANGE PROPOSAL 1 MODEL OF THE MODEL Figure A 1248 VES…
  • p. 70 …BOX 1955 SEATTLE, WASH. 9824 (BOE 720) ENGINEERING CHANGE PROPOSAL FACILITY DATE 27 December 1966 1…
  • p. 79 …THE TASK GROUP WILL CONVENE AT BOEING, SEATTLE ON 4 APRIL TO DEVELOP A TEST PLAN…
  • p. 80 …AFB MONT RUWMDAA/APPRO THE BOEING CO SEATTLE WASH RUN 4804/NORTH AMERICAN AUTONETICS DIV ANAHEIM…
  • p. 81 …THE TASK GROUP WILL CONVENE AT BOEING, SEATTLE ON 4 APRIL TO DEVELOP A TEST PLAN…
A preliminary analysis was made of the Fault Isolator Test Tape (FITT) from LF, D-7 and E-8. Targeting support was schedualed for a G&C Channel 50 data dump at LF's E-2 and E-9 which, although returned to alert, were still felt to possess useful data. The investigation was held in suspense until the arrival of the OOAMA team on 18 March 67. 67

Echo Flight incident was approached in four ways in the investigation: 68

a. Review of events on or near 16 March 67 and of flight configuration.

b. Investigation, and where possible elimination, of circumstances which may have been responsible for the incident.

c. Investigation of means of causing the results which were noted at the time of shutdown.

d. Investigation of similar events.

In reviewing the events of the incident, the LCC crew was questioned by Wing Maintenance Evaluation Team (DCMET), COAMA, and Boeing Company personnel on 16 March 67. 69

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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.