Anyone near that aircraft in DEL pre-departure would have noticed a 8x4 hole in the fuselage....!?!
You mean, like we used to say about Airbus engine cowl door latches ?
An access panel that had torn itself out, for example during a hard landing, would not do so without leaving some residual airframe damage which in all likelihood would have made fitting a replacement panel more than simply a plug-and-play exercise.