As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3391 FOUND FUEL 2 LO LEVEL WARNING MSG CAME ON IN CRUISE, BUT NR 1 FUEL TANK SHOWS DASHES, FUEL 1 LO LEVEL WARNING MSG CAME ON IN THE DESCENT & THEN FUEL TANK NR 2 SHOWS DASHES. THE AIRCRAFT WAS REMOVED FROM SERVICE. C/W: RAR FUEL CONDITIONING UNIT IAW AMM 28-41-01, OPS CHECK GOOD. THE AIRCRAFT RETURNED TO SERVICE.