Oxygen Tank Explosion – Apollo 13

Roughly 56 hours into the flight, an oxygen tank in the service module exploded after a routine stir, damaging a second tank and knocking out the command module's main power and oxygen supply.

The famous phrase most often quoted as "Houston, we have a problem" was actually first radioed by Jack Swigert as "Houston, we've had a problem," repeated by Jim Lovell moments later. Mission Control immediately began working the problem of getting the crew home alive.

The damaged Apollo 13 service module photographed after separation, showing the panel blown off by the oxygen tank explosion (NASA AS13-59-8500). — The damaged service module, photographed after separation just before reentry.

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sourcesNASA Mission Report · Apollo Flight Journal · NASA Image and Video Library — full list on Apollo 13