Assuming a light load of un-awake passengers on a late night takeoff how would this be noticed after takeoff rotation? annunciated or air noise?
When airborne, the only thing of note would be handle sticking out. There is no extra noise. The aircraft's pressurisation would be placing several hundred pounds pressure on the hatch keeping it shut. A very, very strong person might mange to pull the handle off, certainly not open the door. On the ground, typically there is more noise, unless of course the hatch falls in. Having the inlet of a Tay within 20 feet would mean everybody would know something unusual has happened. It's even noisier on a F70 as some of our passengers found out.
PM