UA165 GUM-FUK 738 cancelled due to maintenance after a a 3.5 hour delay. Return UA166 FUK-GUM on same day cancelled as a result.
UA196 GUM-NRT 738 cancelled due to maintenance after a half hour delay. Return UA865 NRT-GUM on same day cancelled as a result.
UA672 SFO-BCN 772 cancelled due to maintenance. Return UA673 BCN-SFO on 5/29 cancelled as a result.