Sitting on an AA1067 trying to eventually get to DTW. Plane is delayed due to mechanical issue, which is understandable - these things happen. However, it is a low hydraulic oil level issue which was apparently identified by the last flight crew that used this aircraft.

Per flightaware that flight landed at 9PM yesterday, and AA waited until after all of the passengers were on board for the 12:55 PM flight to DTW today to begin working on the issue.

Anybody else have problems with this “why the (bleep) did you wait till now to fix this” type of delay?

Last month I was sitting in the terminal at DFW and out the window I could see big orange tag hanging off of what (I believe) to be an air speed pitot tube. Sure enough, it wasn’t until the pilot did his pre-flight walkthrough that it was identified that they needed a different aircraft, causing a 2 hour delay to be announced last second. This was a plane that had landed 12 hours beforehand and was known to be in bad enough shape to hang a maintenance tag on a piece of equipment.

I understand the oncoming captain has to inspect the aircraft prior to putting their own life on the line, but why wait for the last minute to begin addressing known issues?