ECO Sensor Trouble Threatens STS-121 Launch

Shuttle tank sensors an issue again in launch processing, Aviation Week and Space Technology

“The modified external tank for the next shuttle mission is starting a processing flow with no schedule margin, while engineers here assess issues that could affect NASA’s May launch target for Discovery, such as those with engine cutoff (ECO) sensors.”

Editor’s note: this story was posted on the Aviation Week and Space Technology website on 5 March 2006 – and was printed in the 6 March 2006 edition of the magazine.

NASA checking shuttle tank concerns, MSNBC

More ECO sensor trouble?, Orlando Sentinel

NASA assesses unexpected reading from fuel tank sensor, Spaceflightnow.com