[GOP_1900AD]

What was the first unusual thing that occurred? And how do you know it?

[BeHoldAPaleHorse]

What was the first unusual thing that occurred?

Pilot stated that the fuel flow indicator for #4 engine was behaving in an unusual fashion.

And how do you know it?

I read the NTSB report. BTW, after rereading the relevant section, I was mistaken--TWA 800 was out of envelope for over two minutes prior to the first anomalous event of any sort.