There was a mission were a plug in one of the combustion chamber injectors
came out during the flight. On it's way out of the engine, it hit the
engine bell putting a hole in the cooling tubes. This caused a hydrogen
leak in the nozzle. The engine controller then adjusted the mixture ratio
oxygen rich and a low level shutdown (low on oxydyzer) occured right
around MECO.
That was STS-93, Eileen's first mission as commander...but that one did not
go to ISS, and there was no engine shut down...
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Jacques :-)
www.spacepatches.info