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1/6 UA836 PVG-ORD 744 returned to gate and cancelled due to aircraft maintenance
1/7 UA836 PVG-ORD 744 delayed 5h30 for now — .bomb says aircraft maintenance but it seems like they're using the plane inbound from SFO that only gets in at 1845.

So it seems that N127UA that was to operate UA836 on the 6th went mx and still hasn't been fixed, so they used N128UA that arrived from ORD (UA835) on the 7th for the extra sector UA2059 PVG-ORD, and now they're waiting for N181UA from SFO (UA857) to arrive to use it for to the originally scheduled UA836 on the 7th.

Of course this means that if they can't fix N127UA by tomorrow there's no plane for UA858 PVG-SFO. Fingers crossed, I guess?


Also this is the second time in a week that UA836 has cancelled due to mx — and it's what the 7th of January?