ejbehr@rs6000.cmp.ilstu.edu (Eric Behr) (06/03/91)
KSC SHUTTLE STATUS - SATURDAY, JUNE 1, 1991 11 A.M.
STS-40/SLS-1 - COLUMBIA (OV 102) - PAD 39-B
Launch of Columbia was scrubbed this morning at about 7:15
a.m. EDT today when one of three inertial measurement units
(IMUs) was deemed unacceptable for launch. The IMUs are the heart
of the orbiter's navigation system and all three are necessary
for launch. The accelerometers in IMU no. 2 were behaving errati-
cally early this morning.
IMU no. 2 will be replaced starting later today. The 58
pound unit is located in the orbiter's flight deck just forward
of the control and display panels. Each IMU is about 10 inches
high, 11.5 inches wide and 22 inches long.
Liquid oxygen and liquid hydrogen propellants are being
drained from the external tank today. Residual hydrogen will be
allowed to boiloff until tomorrow morning.
Liquid oxygen and liquid hydrogen storage farms at the pad
will be replenished on Sunday and Monday.
Columbia's fuel cell storage tanks will be topped off with
liquid oxygen and liquid hydrogen reactants on Monday.
STS-40 Commander Bryan O'Connor and pilot Sid Gutierrez will
be flown by STA to Edwards Air Force Base, Calif. tomorrow. They
will practice landing approaches on the primary landing site's
runways, and return to KSC tomorrow night. The rest of the crew
will remain at KSC for the Wednesday launch attempt. Payload
specialist Drew Gaffney will leave the catheter in place in a
vein near his heart.
The 30 rodents and some 2,500 tiny jellyfish will be re-
placed in the orbiter middeck and in the Spacelab. These opera-
tions will be conducted in parallel with the IMU replacement.
Pending the successful completion of planned work, the
launch countdown is scheduled to resume at the T-11 hour mark at
about 5:40 p.m. EDT Tuesday. Launch is planned for 8 a.m. EDT
Wednesday, June 5.
--
Eric Behr, Illinois State University, Mathematics Department
Internet: ejbehr@rs6000.cmp.ilstu.edu Bitnet: ebehr@ilstuGIPP@gecrdvm1.crd.ge.com (06/12/91)
In article <1991Jun03.022625.5287@rs6000.cmp.ilstu.edu>, ejbehr@rs6000.cmp.ilstu.edu (Eric Behr) says: > > KSC SHUTTLE STATUS - SATURDAY, JUNE 1, 1991 11 A.M. > > > STS-40/SLS-1 - COLUMBIA (OV 102) - PAD 39-B > > > > Liquid oxygen and liquid hydrogen propellants are being >drained from the external tank today. Residual hydrogen will be >allowed to boiloff until tomorrow morning. > > Liquid oxygen and liquid hydrogen storage farms at the pad >will be replenished on Sunday and Monday. > What is done with the liquid ox and liquid hydrogen which is drained? does it go back into the supply depot, or is it considered contaminated and disposed of? > >-- >Eric Behr, Illinois State University, Mathematics Department >Internet: ejbehr@rs6000.cmp.ilstu.edu Bitnet: ebehr@ilstu