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December 16,
2002: No inspections
are planned on Columbia related to the BSTRA ball crack evaluation.
October 21,
2002: Polishing,
welding and cleaning on the flow-liners are complete.
September 27,
2002: Flow liner weld
certifications continue.
August 12,
2002: Columbia was
moved to a storage facility to await flow liner repairs prior to
its next mission.
July 18,
2002: Following
completion of Main Propulsion System (MPS) liquid hydrogen and
liquid oxygen flow liner inspections on all four Space Shuttle
orbiters, mission managers have changed all launch dates to under
review.
July 8,
2002: Inspections
of Columbia’s Main Propulsion System (MPS) liquid oxygen and
hydrogen flow liners are complete. Due to the magnetic property of
the stainless flow liners on Columbia, ultrasonic testing proved
to be a more effective means than eddy current to determine if
cracks were present. Using ultrasound, technicians identified
three cracks on engine two liquid hydrogen flow liner.
July 2,
2002: One
crack, similar in size to cracks found on Atlantis and Discovery,
has been confirmed in one flow liner in a liquid hydrogen line on
Columbia.
June 27,
2002: After
discovering small cracks on the LH2 Main Propulsion System (MPS)
flow liners in two orbiters, program managers decided to move
forward with inspections on Columbia before clearing it for flight.
June 24,
2002: After
discovering small cracks on the LH2 Main Propulsion System (MPS)
flow liners in two orbiters, program managers decided to move
forward with inspections on Columbia before clearing it for
flight.
May 24,
2002: Workers
installed the SPACEHAB / FREESTAR payload into Columbia's payload
bay after managers determined the small scratch on a support
attachment was not a concern.
May 23,
2002: Installation of
the SPACEHAB/FREESTAR payload was temporarily delayed giving
payload mangers time to evaluate a small scratch on a payload
support attachment noticed by technicians this morning.
May 5,
2002: As leak checks
were being completed on Freon Coolant Loop No. 2, technicians
noticed that several seals needed to be replaced and additional
leak checks completed before servicing begins.
April 29, 2002: Over
the weekend, Shuttle technicians completed the replacement of a
cold plate located in bay 5 after several small dings were
discovered on the cold plate surface.
April 22, 2002: An
engineering team is evaluating the status of a cold plate located
in bay 5 after several small dings were discovered on the cold
plate surface.
April 18, 2002: Mid-body
X-rays are being conducted on both freon coolant loops and a flow
proportioning valve filter has been replaced in Loop No. 1.
April 11, 2002: A control
panel has been removed from the crew compartment to replace a
faulty relay.
March 14, 2002: X-ray and
ultrasound operations will begin later today to pinpoint the
location of the contamination that caused degraded performance of
freon loop No. 1 during the STS-109 mission.
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