Shuttle Launch Delays; Problems Found

By: By MARCIA DUNN, AP Aerospace Writer
By: By MARCIA DUNN, AP Aerospace Writer

CAPE CANAVERAL, Fla. (AP) - NASA called off Thursday's launch of space shuttle Atlantis after detecting problems with fuel gauges in the shuttle's external tank.

Officials will try again Friday to launch the shuttle, NASA said.

Two of the four sensors in the shuttle's liquid hydrogen tank indicated that the tank was dry, even though there was fuel inside. Three sensors must be working properly to fly, NASA spokesman Paul Foerman said.

The sensors are critical to ensure that the shuttle's three main engines don't shut down too soon or too late during liftoff.

Problems with the sensors have delayed shuttle launches before, most recently in September 2006.

(Copyright 2007 by The Associated Press. All Rights Reserved.)


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