STS-51-L – Space Shuttle Challenger disaster STS-51-L crew. Crew members are (left to right, front row) astronauts Michael J. Smith, Francis R. (Dick) Scobee and Ronald E. McNair; Ellison S. Onizuka, Sharon Christa McAuliffe, Gregory Jarvis and Judith A. Resnik. Credit: NASA On January 28, 1986, 1986, a catastrophic structural failure 73 seconds after liftoff of the Space Shuttle, mission STS-51-L, destroyed the orbiter OV-099 Challenger killing all seven crew members – Francis R. "Dick" Scobee (1939–1986), Michael J. Smith (1945–1986), Ellison S. Onizuka (1946–1986), Judith A. Resnik (1949–1986), Ronald E. McNair (1950–1986), Gregory B. Jarvis (1944–1986) and S. Christa McAuliffe (1948–1986). The disaster was caused by the failure of the two redundant O-ring seals in a joint in the Space Shuttle's right solid rocket booster (SRB). The record-low temperatures of the launch reduced the elasticity of the rubber O-rings, reducing their ability to seal th...