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KSC SHUTTLE STATUS REPORT - FRIDAY, MAY 24, 1991 - 10 AM

 STS-40/SPACELAB LIFE SCIENCES 1 - COLUMBIA (OV 102) - PAD 39-B
                         LAUNCH - JUNE 1

WORK IN PROGRESS:
- Retest of the new multiplexer demultiplexer (MDM) involving the
orbiter and booster hydraulic system.
- Inspections and cleaning of temperature tranducers for  instal-
lation in the vehicle.

WORK COMPLETED:
- Installation of plugs instead of temperature transducers in the
main propulsion system liquid hydrogen main engine inlets.  Offi-
cials determined that these transducers  can  be  eliminated  and
still  meet  the  launch  commit  criteria  and flight rules.  An
analysis is continuing to determine if the liquid oxygen tempera-
ture transducers can also be eliminated.
- Connections of the new general purpose computer and of the  new
MDM.

WORK SCHEDULED:
- Installation of six propellant temperature probes tomorrow.
- Retest of the new general purpose computer tomorrow.
- Closeouts of the aft compartment begin Sunday.
-  Start  of launch countdown Tuesday at 5 p.m.  at the T-43 hour
mark.
- Launch at 8 a.m. EDT Saturday, June 1.  Launch window closes at
10 a.m. EDT.

           STS-43/TDRS - ATLANTIS (OV 104) - OPF BAY 2

WORK IN PROGRESS:
- Gimbal test of the orbital maneuvering system engines.
- Thermal protection system operations.
- Potable water servicing.
- Water spray boiler leak and functional tests.
- Main engine and main propulsion system tests.
- Functional tests of the orbital maneuvering system.
-  Tests of the forward reaction control system at the Hypergolic
Maintenance Facility.
- Auxiliary power unit lube oil servicing.

WORK COMPLETED:
- Tests of the ultra high frequency communications system.

WORK SCHEDULED:
- External tank door functional test next week.
- Installation of the forward reaction control system next week.
- Tests of the nose wheel steering system next week.
- Anti-skid brake test planned next week.

          STS-48/UARS - DISCOVERY (OV 103) - OPF BAY 1

WORK IN PROGRESS:
- Window polishing.
- Preparations to remove the three shuttle main engines.
- Thermal protection system operations.
- Inspections of the orbiter's hydraulic system.

WORK COMPLETED:
- Main engine flight readiness test.
- Flow checks of the main propulsion system helium regulators.

WORK SCHEDULED:
- Removal of the three shuttle main engines next week.


          STS-49 - ENDEAVOUR (OV 105) - VAB HIGH BAY 2

WORK IN PROGRESS:
- Purges of the freon coolant loop.
- Installation of platforms in the midbody and aft compartment.


          STS-43 SOLID ROCKET BOOSTERS - VAB HIGH BAY 1

WORK IN PROGRESS:
- Mating the right forward assembly.
- Joint closeouts.

WORK SCHEDULED:
- External tank mate to the boosters on June 3.

-- 
Eric Behr, Illinois State University, Mathematics Department
Internet: ejbehr@rs6000.cmp.ilstu.edu    Bitnet: ebehr@ilstu