Cioè la Grumman avrebbe preso il faldone riferito a tutte le prove tecniche, progetti, etc del LEM e l'avrebbe mandato al macero ?

Per favore dimmi che stai scherzando (ironico)...

Sulla wikia inglese mi pare che qualche schema ci sia...

In fact Grumman does have answers. Most people are surprised to learn that the design documentation for the lunar module amounts to a boxcar's worth for each individual spacecraft. Aerospace engineering is not like building a house, where a mere roll of blueprints and good carpentry skills suffice. Each individual part must be meticulously documented, inspected, and signed off at each stage of its lifetime: from initial conception to detailed design to manufacturing to installation. This represents an enormous amount of documents.

Grumman is an aerospace engineering firm, not a museum. It did not wish to house the hundred thousand cubic feet or so of design documentation at its expense. As an aircraft manufacturer, Grumman is already required by aviation regulations to store the documentation for each commercial aircraft it builds. If the government does not require the manufacturer to retain the documentation, there is little incentive to do so voluntarily.

Only cursory material was retained for historical reference, and a few detailed items were saved by private citizens who picked them off Grumman's trash heap. But it's no great surprise to anyone who works in aerospace that the detailed documentation was destroyed.