Was that the PMdg developers I heard rushing for cover? :-)No, this was a real situation I(we) came across last night.Captain's report (paraphrased):When using Center Tank (with about 1.5 tonnes to go), the Right Main Tank was noticed to be showing 350kg's less than the Left Tank. Later on in flight, after the C Tank had been emptied, there was an imbalance large enough between the L & R tanks to cause the QRH to be produced.Stick checks were carried out on the ground and the gauges matched the sticks. Fuel used from tanks matched fuel flow to the engines (over time)... so all the fuel was getting to the engines.Any ideas why the fuel was being used from the right tank faster and sooner than it should have? Eker? (None of the answers we came up with seemed to fit all the symptoms).Thanks.Cheers.Ian.

Once again we see that PMDG have done an excellent job in modelling the real aircraft, and we all thought this was a bug in the software!

I guess this doesn't help the 737s twitchy rudder any eh?Jeff