The interplay of content and context also added to the meaning of
each document. For example, many of the documents were bound
together in sets arranged in numerical order that refer to specific
symptoms of the spacecraft’s malfunction procedures. The Electrical
Power Subsystem (EPS) malfunction procedures show what should
appear in the gauges on the Apollo Spacecraft’s control panel
indicating to an astronaut whether the power systems are normal or
abnormal.Adding to the complexity of these documents are notes, drawings,
and comments written on the blueprints and proofs; there are also
papers and redrawn diagrams attached to them that cover over the
original base. Furthermore, the documents are often signed and dated
by various people, including Swigert and other engineers involved
with reviewing the Malfunction Procedures. The circumstances in
which the documents were drafted or marked also add to the
complexity of their meaning. These were some of the documents used
in the AS-204 (Apollo 1) investigation held between January 27th and
March 21st, 1967, revealing the review process for the Block I and
Block II spacecraft.