Has anyone considered that, for example, this guy had had the door seal or the TCAS DDR'd previously on the aeroplane and was fed up of it not being fixed?
Been there done that. Door Seal
Fed up with pax complaining about the noise like a pig getting its throat cut.
Fed up going down the back and trying to shove a plastic bag to seal it.
Go at sub 10,000 and have to clean up all the barf bags.
Tell the Engineers about it they lub it, all this seems to do it change the tone.
Put it in the tech log they sign it off as inspected and SATIS while lubing it again.
Eventualy it becomes that bad you can't pressurise. Goes in the techlog defered as a pressurisation problem. Ops need the aircraft and the when the engineers fit a new seal the aircraft isn't left long enough for the glue to cure. 2 days later same problem, full flying program the prospect of having to work with this heap for another 3 days before it gets looked at again....
Yep ground it or it will never get fixed until the next major maint.