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1994-04-08
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4/6/94: LAUNCH ADVISORY -- STS-59 LAUNCH REMAINS ON SCHEDULE FOR APRIL 8
From: PAO.KSC
Subj: STS-59 LAUNCH ADVISORY
Bruce Buckingham
April 5, 1994
6:45 p.m.
KSC Release No. 42 - 94
Borescope inspections performed today of Endeavour's three main engine
turbo pumps have indicated they are well within specifications, and the KSC
launch team is now proceeding with operations to closeout the aft compartment
and launch Endeavour on Friday, April 8.
The decision to perform the inspections on the engines, specifically the
high pressure oxidizer turbo pumps, was a result of engineers discovering
smaller than permittable vanes, or stationary guides, in the preburner on
engines at Canoga Park, Calif. The vanes in the preburner help direct the flow
of the liquid oxygen through the turbo pump as it operates under extremely high
pressures.
Inspections were conducted at Launch Pad 39A with engineers using a
borescope camera to inspect the internal components of the turbo pump.
Inspections were completed early this evening.
As a result of the need for the additional inspections, the launch of
Endeavour was moved from Thursday to Friday. The two-and-a-half hour window
opens at 8:06 a.m. (Remaining in the countdown schedule is the option to launch
Endeavour as much as an hour earlier at 7:06 a.m. This option will be
implemented the day prior to launch day if mission managers judge the weather
may not be acceptable at 8:06 but could be acceptable earlier.)
The launch of Endeavour will mark the beginning of the third Space Shuttle
mission this year and the sixth for the orbiter Endeavour. The STS-59 mission
will feature the first of two planned flights of the Space Radar Laboratory
(SRL-1) scheduled for this year.
# # # #
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■ Via FTL BBS (404-292-8761) and NASA Spacelink (205-895-0028)