Originally Posted by eflyte

5/15 UA 926 SFO-FRA cx due to aircraft maintenance.
5/16 UA 902 FRA-SFO cx as a result, 927 operating with the aircraft inbound from SFO as 903.

Not sure if this is still trickle-down from the problems mid-week w/ the 744's in PVG and NRT or whether this is a new airframe w/ problems. Looks like 926 usually operates using an aircraft that has arrived from Europe earlier in the afternoon, which suggests the latter.