International treaty required the United States to complete the core assembly of the International Space Station, up through the installation of Node 2 (later called the Harmony module) as soon as possible. NASA had previously committed to the US Congress that Node 2—onto which the European Space Agency’s Columbus module and the Japanese Kibo module would be berthed—would be launched by February 2004.
While meeting that date was clearly impossible after the Columbia accident, NASA was still compelled to complete its share of the work on the ISS as soon as possible. There were still many flights needed to complete the ISS’s central truss and expand its solar power system before Node 2 could be installed. None of that work was possible without the shuttle. The modules were already built, but there was no other way to get them into space and support the spacewalks necessary to install them. NASA therefore had to get the shuttle flying again.
In May 2003, three months after the accident and before the Columbia Accident Investigation Board (CAIB) had completed its investigation, NASA expected to resume shuttle operations by the end of 2003 or early 2004. NASA wanted to be sure that it was not letting schedule and political pressure force the agency into taking undue risks.
In early May, NASA Deputy Administrator Fred Gregory announced that former astronaut Lt. General Thomas Stafford had been requested to head a group to provide an independent assessment of NASA’s return-to-flight plans. On May 22, 2003, NASA named former shuttle astronaut Richard Covey to report to Stafford and lead a working group to oversee and test NASA’s compliance with the CAIB’s findings and recommendations. Some of the members of the panel included former Secretary of the Navy Richard Danzig, Apollo 8 astronaut Bill Anders (who was also the retired CEO of General Dynamics), and former NASA Launch Director Bob Sieck, among a host of other government and industry executives and technical experts.
NASA Administrator Sean O’Keefe said that NASA would only decide that it was safe to fly the shuttle again when the Administrator had the Stafford-Covey Task Group’s independent confirmation that NASA had fully complied with the CAIB’s recommendations.
The Task Group went into full operation once the CAIB’s report was issued in August 2003. The CAIB made 15 specific recommendations that NASA needed to address before the shuttle could return to flight. Many of those findings required extensive changes to hardware, procedures, and management practices.
NASA’s hopes of flying again in 2003 or 2004 quickly were overtaken by the realization that there was a long and difficult road ahead. By December 2003, the planned launch date had moved to September 2004. However, an interim report by the Stafford-Covey Task Group that month said that “progress on the many recommendations is uneven” and that it was too soon to say whether that new launch date was possible. The Task Group’s interim report also chided NASA for not being timely in responding to some requests for information.
It was not comfortable information for O’Keefe to hear. However, it meant that the Task Group was doing its job of being “an umpire calling balls and strikes in a zone defined by the CAIB recommendations.”
The Task Group issued additional interim reports in April 2004 and January 2005, noting progress as well as areas that still required attention.
By June 2005, NASA had closed out all but three of the CAIB’s recommendations. The Task Group believed that the three remaining recommendations were so challenging that NASA could not comply completely with the intent of the CAIB. For example, the most contentious open item was a vaguely-worded recommendation that NASA have the ability to repair the “widest possible range of damage” when the shuttle was on orbit.
In July 2005, the Task Group was satisfied that NASA had done everything in its power to make the shuttle as safe as possible to fly again, and they told the Administrator that NASA had met the intent of the CAIB’s requirements for returning to flight. The Task Group’s final report made it clear, however, that it was up to the NASA Administrator and his staff—not the CAIB or the Task Group—to determine if the remaining risk was low enough to allow the shuttle to fly.
Shuttle Discovery launched on the STS-114 mission on July 26, 2005. Although the external tank unexpectedly (alarmingly) shed foam again, the safety inspection and repair techniques that NASA developed in the wake of the CAIB report ensured that the crew was able to complete their mission and return safely to Earth.