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All 34 malfunction symptoms and 1 Special subroutine associated with the five subsystems operating in conjunction with each other in the Environmental Control System (ECS): 1) Oxygen subsystem; 2) Pressure suit circuit (PSC); 3) Water Subsystem; 4) Water-glycol subsystem; 5) Post-landing ventilation (PLV) subsystem. This set of documents is undated. Circa 1968 - 1969.
NASA - National Aeronautics and Space Administration, SM2A-03-SC101-(2), Apollo moon mission space race ECS environmental control system, Space flight
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National Aeronatics and Space Administration (NASA), "Environmental Control System (ECS) Malfunction Procedures Symptom 1 to 37 - SSR1 - Undated Group 2" (1968). Apollo One Investigation Materials. 3.