I was on two TWA 747-131 flights: LAX-JFK in 1974 and JFK-LHR in 1984. All I remember of the former was a button on the armrest which enabled one to inflate or deflate an air cushion in the seat and, thereby, adjust for firmness.
The latter bird featured TWA's new interior - the new seat covers and side panels. It was a beautiful airplane, very clean and modern, and it is strange to think that the aircraft is probably now stored out there in the desert.
I did not note the registration of either aircraft and, therefore, do not know whether I flew on the ill-fated plane involved in the flight 800 tragedy.
The aeroplane has unveiled for us the true face of the earth. -Antoine de Saint-Exupery