![]() MONDAY, MAY 11, 1998 (11:36 AM EDT) ![]()
NOTE: Replacement of Discovery's master event controller No. 1 and the change-out of multiplexer demultiplexer No. 4 are complete. Over the weekend, technicians completed work on the mobile launch platform's gaseous nitrogen system. The payload bay doors are closed and crew module/SPACEHAB pressure leak checks are complete. Loading of hypergolic propellant into Discovery's onboard storage tanks is under way, with oxidizer loading in work today and fuel loading slated for tomorrow. Preparations for next Monday's tanking test of the new super lightweight external tank are ongoing this week. STS-91 SCHEDULED OPERATIONAL MILESTONES (dates are target only):
![]() (NODE-1, PMAs 1 and 2)
NOTE: Replacement of the yaw actuator on Endeavour's main engine No. 2 is complete. Window No. 4 has been removed and replacement occurs this week. Drag chute installation is in work and preparations for radiator deployment and inspection begin today. ![]()
NOTE: Post-flight inspections of Columbia's main engines are complete. Main landing gear wheel and tire removal begins today. Orbiter power system validations are complete and forward reaction control system functional tests pick up tomorrow. The payload bay doors are open and workers have demated Neurolab's electrical connections. Payload removal is slated for tomorrow. STS-93 SCHEDULED OPERATIONAL MILESTONES (dates are target only):
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