The point being that if the solution was so bleeding obvious why was it that it didn't occur to anyone for the nearly 3 hours of in-flight investigations beforehand?
It clearly wasn't something that happened on every flight, or even that frequently (how many Jag fleet hours had there been before these incidents), and it must have been something really wierd if it even inhibited the nitrogen system (I'm not a Jag man so I could be wrong in assuming it has one). Having dealt with the indians on other aircraft it wouldn't surprise me if they didn't relase incident data to the DA (so the DA had no data on which to conduct an investigation) and/or declined to authorise a PDS task to look into it.
PDR