MD-11
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 100; Flight Crew Total 8000; Flight Crew Type 3400
Aircraft Equipment Problem Less Severe; Inflight Event / Encounter Fuel Issue
Flight Crew Requested ATC Assistance / Clarification
Aircraft
On descent we received a L2 FUEL QTY/USED CHK alert. We requested priority handling. While running the checklist we were switched to Approach and were told they were handling it as an emergency and we acknowledged. Finishing the checklist; it did appear we had 'lost' 3000 pounds; but there was not enough time to determine where from (idle descent). The aircraft fuel increased as we descended to where we were only 1000 pounds low; then 2000 pounds low on shutdown. Lowest tank was #2; approximately 1400-1600 pounds lower than #1. Approximately 24000 pounds total.
MD-11 Captain reported observing a fuel quantity indication anomaly during descent.