Re: Fuel tank pumps
(1) If a directive (AD or Airworthiness Directive in the official terminology) is issued, it'll be done on time or the aircraft is grounded - end of story, that's the way the regulations work.
(2) Pretty much all aircraft parts, at least moving parts are designed to be line replaceable. They'll either be swapped out and checked on the bench, or are designed that they can be checked easily enough. Your safety won't be compromised.
(3) This is AVTUR (basically very clean Diesel), not AVGAS or (basically high octane petrol), the fumes are generally not a significant problem at sea level conditions - it's in the heat or at high altitudes that a lot of fumes get given off creating a significant hazard. Mind you, it won't be much fun, but not life threatening.
G