S89-39537 (July 1989) --- Two astronaut-crewmembers for NASA's STS-34 mission are briefed on inflight maintenance procedures on the mid-deck of the Space Shuttle crew compartment trainer in JSC's Shuttle mockup and integration laboratory. They are Ellen S. Baker and Michael J. McCulley, mission specialist and pilot, respectively for the scheduled Oct. 1989 mission aboard the Atlantis.