1. The scavenge pump removes leftover fuel from the fuel tank. 2. The cross-feed manifold theory has replaced the scavenge pump as a center of suspicion. 3. Still missing, however, is the auxiliary fuel pump, also known as a scavenge pump . 4. One requires a flame arrestor on the scavenge pump . 5. It was hoped that the scavenge pump would be found in that area, crash investigators said. 6. The scavenge pump was of strong interest in part because it was missing, a top investigator said. 7. This is a small " scavenge pump " that draws out any last few gallons of fuel. 8. Still missing is an auxiliary fuel pump, called the scavenge pump , which is used to drain the tank. 9. There, it was pumped to header tanks located in the leading edges of both wings by the scavenge pump . 10. The FAA said airlines within 90 days must replace scavenge pumps that are found to have the silicone materials.