Apr 8 1992
From The Space Library
NASA managers decided to replace all three main engines aboard the Space Shuttle Endeavour because of problems with powerful oxygen pumps that came to light after an engine test firing. Rocket engineers initially believed that Endeavour had sailed through its flight readiness firing in good condition, with no signs of any major problems in the ship's propulsion system. But detailed analysis of data from the 22-second test indicated the liquid oxygen high pressure turbopump bolted to main engine No. 2 had experienced high vibration levels during engine operation, apparently because of abnormal bearing wear. NASA decided to replace all three of the engines to minimize the impact on the Shuttle's launch processing. (UPI, Apr 8/92; AP, Apr 8/92)
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