Encyclopedia Astronautica
1967.04.10 - Two task teams on Apollo CSM electrical systems established


MSC ASPO Manager George M. Low told Sydney C. Jones, Jr., MSC Communications and Power Branch, that he wanted to establish two task teams on CSM electrical systems.

The first team would study the wiring harnesses on spacecraft 2TV-1 and 101 and all subsequent spacecraft to determine actions needed to save the harnesses as installed. Low asked: "Can a sufficient number of nylon wire bundle ties be replaced to meet the requirements of our new materials specification? Can silicone rubber padding and chafing guards be replaced? What fixes must be incorporated to meet requirements of the recent inspection activities? Has the harness been mistreated in recent months, as was mentioned to me by some of the astronauts? How about water glycol spillage in 101?" The task team was to include members from the Engineering and Development and Flight Crew Operations Directorates, the Flight Safety Office, and the Reliability, Quality, and Test Division. Low asked firm recommendations concerning the harnesses in spacecraft 2TV-1 and 101 by April 15 if possible.

The second task team would study flammable materials used with all other electrical systems. Low referred "specifically to the RTV (room temperature vulcanizing) used on the backs of circuit-breaker panels and elsewhere; the circuit breakers themselves; the electroluminescent panels; and any other materials generally associated with the electrical system." Low said Structures and Mechanics Division (SMD) had done some very promising work with coatings for the circuit-breaker panels but these coatings might not be applied to some of the panels because of the open mechanical elements of many of the switches. He recommended that Jones ask representatives from SMD, the Instrumentation and Electronics Systems Division, and the Flight Safety Office to work with him. Low asked Jones to let him know by April 12 when it would be possible to make specific recommendations as to what needed to be done.

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