yee@trident.arc.nasa.gov (Peter E. Yee) (04/24/91)
KSC SHUTTLE STATUS REPORT - TUESDAY, APR. 23, 1991 - 11:30 a.m.
STS-39/DoD - DISCOVERY (OV 103) - PAD 39-A
LAUNCH - NO EARLIER THAN APRIL 28
WORK IN PROGRESS:
- Launch scrub announced at 1:15 a.m. EDT when a pressure
transducer on the high pressure oxidizer turbo pump for the No. 3
main engine failed.
- Analysis of engine data.
- Preparations for payload servicing operations.
- Boiloff of liquid hydrogen in the external tank.
WORK COMPLETED:
- Draining propellants from the external tank.
- Rotating Service Structure was moved in place shortly after 8
a.m. for access.
WORK SCHEDULED:
- Draining the liquid oxygen and liquid hydrogen reactants from
the fuel cell storage tanks tomorrow.
- Access to the aft engine compartment tomorrow.
- Payload servicing operations Thursday.
- Launch no earlier than Sunday, April, 28 pending troubleshoot-
ing and repairs of the no. 3 main engine.
STS-40/SPACELAB LIFE SCIENCES 1 - COLUMBIA (OV 102) - OPF BAY 1
LAUNCH - MAY
WORK IN PROGRESS:
- Thermal protection system operations.
- Landing gear functional tests.
WORK SCHEDULED:
- Weight and center of gravity checks tomorrow.
- Attaching the orbiter to the transporter.
- Tow to the Vehicle Assembly Building targeted no earlier than
Thursday.
WORK COMPLETED:
- Final aerosurface positioning for rollover.
- Payload bay doors closed for the transfer.
STS-43 - ATLANTIS (OV 104) - OPF BAY 2
WORK IN PROGRESS:
- Preparations to drain residual hypergolic propellants from the
onboard storage tanks.
- Removal of ferry flight fixtures.
- Inspections of the cabin air recirculation system.
- Removal of the tires.
- Shuttle main engine inspections.
- Removal of carrier panels from around the main engines.
WORK COMPLETED:
- Tail cone removed.
- Payload bay doors are opened.
WORK SCHEDULED:
- Tests of the orbiter's electrical system.
- Replacement of the no. 3 fuel cell.
STS-40 SOLID ROCKET BOOSTERS - VAB
WORK IN PROGRESS:
- Preparations to mate the orbiter to the external tank.
- Routing cables between the tank and boosters and launch plat-
form.
- Closing out the solid rocket booster field joints for flight.