As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: THE RIGHT AFT FUEL PUMP, WHEN TURNED OFF, DOES NOT ACTIVATE THE"LOW PRESSURE " LIGHT WHEN CROSS-FEEDING DURING FLIGHT. PERFORMED OPERATIONAL CHECK OF RIGHT HAND AFT BOOST PUMP. PER AMM 28-22-4. CHECK GOOD. LOW PRESSURE LIGHT ON WHEN PUMP IS OFF.