JFK-Heathrow in 1966 or 67 with my mom & grandmother, when I was about 8.

It was TWA (presumably a 707), it was night & the plane developed mechanical trouble on the tarmac ... for at least a couple of hours, we watched out the window as workers wandered around the plane (I very clearly remember the relentlessly flashing amber light of their truck). My mom got increasingly irritated, and announced we should've flown BOAC instead. She said she'd never take TWA again (not a bad policy, really).