Md-11 flight crew reported that after loading ufob into the FMS; a vr mismatch message was received ...

Attributes
ACN	1695239
Time
Date	201910
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	MD-11
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Component
Aircraft Component	FMS/FMC
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Person 2
Function	Pilot Flying Captain
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural MEL

Narrative:

MEL states; 'after all engines are started; enter usable fuel on board (ufob) on the FMS weight init page.' after loading ufob in either mcdu 1 or 2 it should crosstalk the ufob to the other. The plane did not crosstalk this information. We got a vr mismatch message because the ufob was not shared to the other side. I have had tank fuel quantity indication write ups before and the ufob may or may not crosstalk to the other side. I don't know when the md-11 stopped cross talking the ufob to the other side but it hasn't the last 3 times I've had this problem. If the ufob does not match each pilot's side will show/announce different vr speeds; stall speeds; limiting speed; stick shaker; etc. Some planes do not crosstalk ufob. MEL does not say to load ufob in both sides. Ensure all md cross talks ufob info or change to MEL to say ensure ufob is loaded in both sides.

Original NASA ASRS Text

Title: MD-11 flight crew reported that after loading UFOB into the FMS; a Vr mismatch message was received due to the UFOB information not being shared with the other FMS.

Narrative: MEL states; 'After all engines are started; enter Usable Fuel on Board (UFOB) on the FMS Weight INIT Page.' After loading UFOB in either MCDU 1 or 2 it should crosstalk the UFOB to the other. The plane did NOT crosstalk this information. We got a VR mismatch message because the UFOB was not shared to the other side. I have had Tank Fuel Quantity Indication write ups before and the UFOB may or may not crosstalk to the other side. I don't know when the MD-11 stopped cross talking the UFOB to the other side but it hasn't the last 3 times I've had this problem. If the UFOB does not match each pilot's side will show/announce different VR speeds; stall speeds; limiting speed; stick shaker; etc. Some planes do not crosstalk UFOB. MEL does not say to load UFOB in both sides. Ensure all MD cross talks UFOB info or change to MEL to say ensure UFOB is loaded in both sides.

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.

Md-11 flight crew reported that after loading ufob into the FMS; a vr mismatch message was received due to the ufob information not being shared with the other FMS.