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MISSION:
STS-101
-- 3rd ISS Flight (2A.2a) - SPACEHAB DM |
|
|
| VEHICLE |
Atlantis/OV-104 |
| LOCATION |
Pad
39A |
| TARGET KSC LAUNCH
DATE/TIME |
April
24, 2000 at about 4:15 p.m. |
| TARGET KSC LANDING
DATE/TIME |
May
4, 2000 at about 12:51 p.m. |
| LAUNCH
WINDOW |
5
minutes |
| MISSION
DURATION |
9
days, 20 hours and 36 minutes |
| CREW |
Halsell,
Horowitz,
Weber,
Williams,
Voss,
Helms,
Usachev |
| ORBITAL ALTITUDE and
INCLINATION |
173
nautical miles/51.6 degrees |
|
| Shuttle
Processing Note |
|
At Launch Pad 39A workers have begun work to replace
Shuttle Atlantis’ faulty rudder/speed brake power drive unit (PDU). Today,
liquid nitrogen lines were used to freeze portions of the PDU’s six hydraulic
lines to prevent air intrusion. Once the fluid in the lines was frozen, workers
moved the Rotating Service Structure (RSS) away from the Shuttle to accommodate
crane activities and the actual replacement of the PDU.
The PDU replacement effort is expected to take
about 4 to 6 hours tonight and then the RSS will be moved back around Atlantis.
On Thursday, technicians will reconnect the hydraulic lines. By Friday managers
plan to complete electrical and mechanical connections and then reinstall the
rudder/speed brake access panels. Over the weekend engineers will conduct a
frequency response test to confirm a successful PDU replacement.
Tomorrow morning, workers plan to replace a leaky
hydraulic discharge hose on the main pump for auxiliary power unit (APU) No. 1.
Also slated for replacement tomorrow is an electronics box located in the
orbiter’s aft compartment. Managers expect this unplanned work to be
accommodated in parallel will other processing efforts at the pad. An additional
hotfire test of APU No. 1 is likely.
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