Workers have begun planned powered down modifications on orbiter Atlantis. This week, work to upgrade the orbiter's mass memory units is under way. Technicians are also replacing window No. 7. Atlantis will resume powered work in mid-December. Orbiter Discovery remains in temporary storage through late October.
Discovery is scheduled to begin a thorough structural inspection and modification period.
Shuttle managers continue to assess the content, schedule and location of this planned work period.