A fuel leak delays the final launch of the space shuttle Discovery until at least Monday, NASA reports.
The launch of the space shuttle Discovery encountered another delay due to a
fuel leak, space agency NASA reported. Space shuttle managers scrubbed
Discovery's launch attempt due to a hydrogen leak at the Ground Umbilical
Carrier Plate, or GUCP.
NASA officials said the next launch opportunity will come no earlier than
Monday. The planned launch on Wednesday had already been delayed due to electrical issues
a main engine computer controller.
The space agency reported that during the process of filling the external
tank, the hydrogen leak was detected at the GUCP, an attachment point between
the external tank and a 17-inch pipe that carries gaseous hydrogen safely away
from Discovery to the flare stack, where it is burned off.
Discovery heads to the International Space Station (ISS) on its final
mission, where it will be taking with it two key components-the Italian-built
Permanent Multipurpose Module (PMM) and Express Logistics Carrier 4 (ELC4)-that
will provide spare parts and storage capacity to the orbiting complex. Discovery
also will deliver Robonaut 2, which will become the first humanoid robot in
Discovery will spend two days heading toward its rendezvous with the ISS. On
the second day of the flight, the crew will perform the standard scan of the
shuttle's thermal protection system using the orbiter boom sensor system
attached to the end of Discovery's robotic arm. On the third day of the flight,
Discovery will approach and dock with the space station. After the hatches
are opened between the two spacecraft, both crews will begin working on
transferring items between the two vehicles.
Flight day four will be focused on more transfer work, a NASA mission
document outlines, while the main activity on the fifth day will be the
spacewalk. The crew will install a power extension cable that could be used
between the Unity and Tranquility ISS modules in the event Tranquility ever
loses power. The NASA mission outline explained it needs to be installed before
the PMM is secured in place because of access to the work area.
After STS-133, space shuttle Endeavour
has one more flight on the manifest. The space agency noted Atlantis has the
possibility of another flight, and it has to be ready for one regardless, as it
would be the rescue vehicle if Endeavour were to need it. According to NASA
files, Discovery has flown more missions than any other shuttle-more than any
other spacecraft, in fact.
Discovery was NASA's third space shuttle orbiter to join the fleet at Kennedy
in Florida. Construction of the
shuttle began in August 1979 and was completed four years later. It is
currently the oldest orbiter in service. The name comes from two Earth-bound
exploring vessels, one used by Henry Hudson in the early 1600s to search for a
northwest passage from the Atlantic to the Pacific, and
the other one of two ships used by British explorer James Cook in the 1770s.
Endeavour, the namesake of NASA's newest shuttle, was Cook's second ship.