Hi Jonathan, I am not entirely sure, but I think that CU
flights are done with wet-leased TA
A320s or A319s. It seems to me that in order to get a Russian aircraft you need to fly CUN
. I am sure someone else will have more accurate information.
Have you tried checking amadeus.net? This website shows the equipment to be used on a particular flight on a particular date. I guess it is not 100% reliable, but at least it should give you an idea.
P.S. I sent you an instant message.
Next flights: MEX-LAX AM 738, LAX-PVG DL 77L, SHA-PEK CA 789, PEK-PVG CA A332, PVG-ORD MU 77W, ORD-MEX AM 738