Flown double-sided cue card carried to the lunar surface on board the Lunar Module Challenger during the Apollo 17 mission, prominently signed and flight-certified on the front in black felt tip, "Gene Cernan, Apollo XVII, Flown to Taurus Littrow." Dated August 31, 1972, the cue card measures 6 x 8 and relates to the Primary Guidance and Navigation System and the lunar module’s Ascent Propulsion System, with side tab reading “Docked APS Burn (PGNS).” Both the front and back pages, 2-33 and 2-34, lists steps if the Descent Propulsion System has insufficient velocity to complete a mode two abort, such as Electrical Power System, Ascent Pressure, and the Environmental Control System. The Docked APS Burn would be used primarily for an abort during insertion into lunar orbit if the descent engine did not provide sufficient velocity to escape from the lunar gravity environment. In fine condition.
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