Originally Posted by ORDnHKG
Just a note to that, UA's 747-400OB are using 81xx, all the numbers are running from 8171 (N171UA) to 8128 (N128UA), therefore 8146 does not exist in UA's fleet at all.
Remember that the domestic portion (ORD-IAD) of UA936 is on 772, not 744. I didn't catch the nose number on the plane.