Md-11 captain reported observing a fuel quantity indication anomaly during descent.

Attributes
ACN	1496073
Time
Date	201711
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	MD-11
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Component
Aircraft Component	Fuel System
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 100 Flight Crew Total 8000 Flight Crew Type 3400
Events
Anomaly	Aircraft Equipment Problem Less Severe Inflight Event / Encounter Fuel Issue

Narrative:

On descent we received a L2 fuel qty/used check 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.

Original NASA ASRS Text

Title: MD-11 Captain reported observing a fuel quantity indication anomaly during descent.

Narrative: 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.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.