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Grumman Corporation Personnel worked as hard as anyone else on the team to bring the Apollo 13 Crew home safely the display of "no can do" attitude shown in the movie is not supported by any historical account available to this contributor. Notwithstanding that this movie used dramatic license to make a better story, a few points should be clarified, particularly concerning the portrayals of Astronaut Fred Haise and the Grumman Corporation: Fred Haise was considered one of the best and brightest of his group (1966) the scenes where he gives Jack Swigert a dirty look in the Simulator, blames Swigert for the Accident, and nearly screws up the course correction maneuver are not supported by any historical account available to this contributor. Because of the serious shortage of battery power this caused considerable concern, but fortunately the battery recovered. An apparent momentary short circuit caused one of the descent stage batteries to vent quite forcefully. However, another and wholly unexpected small explosion - not depicted in the movie - did occur in the descent stage during the return to earth. Since Apollo 13 only fired the descent engine for a few short course corrections, the rupture of the disc was fully expected and it did not concern either the crew or Mission Control. The tank was very well insulated, but heat did slowly leak in, so if the descent engine were not used by a certain time (long after the scheduled landing) a burst disc would rupture to protect the tank from excessive pressure.
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To save weight, most of the helium to pressurize the descent stage propellants was stored in a cold, supercritical state. Heading back to Earth, an explosion occurs and the alarmed crew request confirmation that it was a "Helium Disc".