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Caroline Trimble

on 5 May 2013

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Transcript of Challenger

"The Challenger Disaster" Mission STS-51-L Introduction: Launched on January 28, 1986 from Cape Canaveral, Florida
Shuttle exploded 73 seconds after the launch
All seven of its crew-members, five men and two women, perished when the space shuttle crashed into the water
The crew included Commander Dick Scobee, Michael Smith, Ronald McNair, Ellison Onizuka, Gregory Jarvis, Judith Resnick, and Christa McAuliffe (who was a school teacher) Technical Issues Four Main Components Blow Holes High pressure leak test
Created tiny, tunnel like holes called blow holes
Blow holes allowed exhaust gasses to reach the primary O-Ring during launch. O-Ring Erosion Gasses and extreme temperatures were allowed to flow through the blow-holes caused the O-Ring to break down
Erosion rate was at 88%
Secondary O-Ring started to erode Joint Rotation Tang and the Clevis misaligned --> joint rotation
Joint rotation --> increased size of gap that O-Ring must cover Low Temperature Day of launch: 36 Degrees
Slow reaction time Video of Launch Communication Issues Lack of communication between engineers and administration There was also a lack of communication between different communities involved in the launch President’s Report and President’s Address "The Commission has conducted an extensive investigation of the Challenger accident to determine the probable cause and necessary corrective actions. Based on the findings and determinations of its investigation, the Commission has unanimously adopted recommendations to help assure the return to safe flight." Design
Independent Oversight
Shuttle Management Structure
Astronauts in Management
Shuttle Safety Panel
Critically Review and Hazard Analysis
Improved Communications
Landing Safety
Flight Rate
Maintenance Safeguards REPORT: "The crew of the space shuttle Challenger honored us by the manner in which they lived their lives. We will never forget them, nor the last time we saw them, this morning, as they prepared for their journey and waved goodbye and 'slipped the surly bonds of earth' to 'touch the face of God.'" ADDRESS: *Demonstration* Ethical Issues Question: Did NASA knowingly take extra risks because of pressure to maintain Congressional funding? Question: Did Thiokol knowingly take extra risks because of fear of losing its contract with NASA? Question: Did the crew have enough information to decide if they wanted to risk the launch? Social Implementations Disastrous effect on national psyche
Worsened by school-teacher on board and children watching
Society's relationship with NASA changed
Public mistrust
Full transcript