Discovery reassembled technicians are carrying out a series of tests on the system.

With space shuttle Discovery's right main landing gear reassembled following the replacement of its four hydraulic seals, technicians now are carrying out a series of tests on the system. The shuttle is in the Orbiter Processing Facility, or OPF. One of Discovery’s struts, which act as shock absorbers during the shuttle's landing, began leaking hydraulic fluid last week. Prior to discovery of the leak, the vehicle had been scheduled to roll over Sept. 19 from the OPF to the Vehicle Assembly Building. The rollover date will be determined after the tests. Discovery is targeted for launch on Oct. 23. Photo credit: NASA/Jack Pfaller