According to the
radar trace, from the lateral point of initiating the first go-around (
and of which, btw, it doesn't look like they flew the one that is published, or even close - be that either the ILS or RNAV - for R14R) until the time of being back at that same lateral point on the approach (
but by then having then completed 2 go-arounds) looks to have taken approximately 33 minutes... that's a long time, at low altitude, in a big jet, and that's why one might be tempted to wonder just how much fuel they would still have had onboard once they'd landed?... hopefully more than enough.