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More Details for 1967-02-01

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MSC management directed contractors and other government agencies to stop all MSC-related manned testing in environments with high oxygen content.

The message dispatched stated: "Until further notice, each addressee and his subcontractors is directed to cease all MSC related manned testing in an environment containing high oxygen concentrations. This restriction applies to all tests in chambers, enclosures, spacecraft, space suits, and includes any other procedure which may require any human activity within a concentrated oxygen environment. Unmanned qualification and development tests may continue in accordance with established plans as long as the contractor can assure that human safety is not jeopardized.

"Waivers for test continuation due to urgent programmatic schedules and commitments will be granted only by the Director of MSC. Each addressee should review all test procedures and use of equipment for unmanned testing using concentrated oxygen under pressure to assure that the tests are necessary and will be conducted safely.

"This message is precautionary in nature. It should not be construed to imply that any preliminary conclusions have been reached in the investigation of the recent Apollo accident.

"Unmanned buildup and preparations should proceed as planned, so that testing can be resumed when this restriction is lifted. . . ."