| The HMU was placed on a test bench and a full functional test was run. |
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| The high fuel flow event could not be duplicated during functional testing of the HMU and EEC components, either as an integrated unit or individually. |
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| Examination of the other five EHSVs from the affected HMU, as well as inspection of 117 other EHSVs, did not reveal similar instances of excessive solder or other foreign object contamination. |
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| The two contend that primordial RNA would have contained HMU at many sites where modern RNA has uracil. |
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