spaceflightnow.com
2340 GMT (7:40 p.m. EDT)
NASA managers today cleared the shuttle Atlantis for launch Friday despite a suspect electrical generator, deciding the risk of an in-flight fuel cell shutdown that could prompt a shortened mission was not a credible threat to the thrice-delayed space station assembly flight. Liftoff time is 11:41 a.m. EDT (1541 GMT).
spaceflightnow.com
1425 GMT (10:25 a.m. EDT)
T-minus 20 minutes and holding. The countdown has paused for a 10-minute built-in hold. Launch remains scheduled for 11:41 a.m. EDT, pending the engine cutoff sensor issue.
During this built-in hold, all computer programs in Firing Room 4 of the Complex 39 Launch Control Center will be verified to ensure that the proper programs are available for the countdown; the landing convoy status will be verified and the landing sites will be checked to support an abort landing during launch today; the Inertial Measurement Unit preflight alignment will be verified completed; and preparations are made to transition the orbiter onboard computers to Major Mode 101 upon coming out of the hold. This configures the computer memory to a terminal countdown configuration.