yee@scam.Berkeley.EDU (Peter Yee) (08/28/90)
KSC SHUTTLE STATUS REPORT - FRIDAY, AUGUST 24 1990 11 A.M.
STS-35 - COLUMBIA (OV 102) - PAD 39-A
The first part of installing ordnance devices on the
vehicle and for performing circuit resistance checks of pyrotech-
nic devices was not completed overnight as planned. Circuitry for
the forward external tank separation system is being evaluated.
All ordnance activities are scheduled to be conducted on Monday.
Auxiliary power unit valves were leak tested yesterday.
Pressurization of the onboard hypergolic propellant tanks is
scheduled tonight. Launch countdown preparations are also set to
begin tonight. The external tank will be purged tomorrow. The
power reactant storage and distribution system is scheduled to be
purged for flight on Sunday.
Columbia and the Astro-1 payload are scheduled for launch on
Sept. 1. The launch countdown will begin at 1 a.m. EDT Wednesday,
Aug. 29, at the T minus 43 hour mark, leading up to the planned
liftoff at 1:17 a.m. EDT on Saturday, Sept. 1.
STS-41 - DISCOVERY (OV 103) - OPF BAY 1
The payload bay doors were closed last night after cleaning
activities were completed. Primary and secondary seals for both
liquid oxygen and liquid hydrogen external tank disconnect valves
are being installed. Work to ready the main landing gear is con-
tinuing. Today, a structural leak check of the orbiter is planned
and the tires and landing gear struts will be pressurized for
flight. All areas of the vehicle are being closed out for roll to
the VAB, now targeted for Sunday.
While in the VAB, Discovery will be mated with its external
tank and solid rocket boosters. Some of the testing of those con-
nections will be conducted after the vehicle arrives at Launch
Pad 39-B.
STS-38 - ATLANTIS (OV 104) - OPF BAY 2
Preparations are underway to make repairs to the freon cool-
ing system. The payload bay doors were opened early today for ac-
cess. The system will be deserviced and the flash evaporator will
be replaced. Reaction control system thrusters have been checked
for moisture and functional checks of the system's regulators are
continuing. Structural inspections of the wings are underway.
Technicians lapped the seal groove on the liquid oxygen 17-inch
disconnect and are scheduled to lap the same area on the liquid
hydrogen side on Monday.