"John Maxson" wrote
Only one of the items on Marchica's list was in Category 1M.
It was titled 'Relief Development Checkout for the
OMS/RCS Crossfeed Isolation Valve.' I did not even
think twice about where to place Lockheed's top priority.

I don't understand how any possible failure of an RCS crossfeed valve
or its indicator can cause an RCS jet to fire. I lived and breathed those
systems for three years and was certified competent to serve in Mission
Control
on them, and I don't understand the connection between a potential anomaly
on this
valve or indicator, and the claim about jets actually firing. Can the
claimant please
explain this and clear up my incomprehension, please?