Flown schematic carried into lunar orbit aboard the Command Module Odyssey during the Apollo 13 mission, 29 x 10.5, signed and flight-certified in black ballpoint, "Flown to the moon on board Apollo 13, Fred Haise, LMP" and "James Lovell, CDR Apollo 13." Originating from the CSM Systems Data flight manual, the schematic, with tab marked "Secondary Glycol," and lower legend identified as “4 SEC COOL, Secondary Glycol Loop,” diagrams the connections and pathways relative to the Environmental Control System. In fine condition.
