All correct Bartender !
And not only MD 80 to 88 family but also all DC9 rear cargo compartment doors were designed exactly the same.
If Jovica is old enough he should remember that IAA... DC9 dropped pax bags on Take Off from one of his own airport some 30 years ago.
Bags can fall out any time depending on pitch, but were never sucked by engine...s,
unless some devil or Diabolo loads Aft Cargo with only some toy baloons and small umbrellas.
Cargo Doors may remain locked open for 3 reasons,
but all 3 started by Ground Support forgetting to close them. 1. Pilots ignore the "Aft Cargo Door Open" light in front of their heads.
(Very unlikely, even for OnurAir)
2. Bulbs to power that warning burned out.
3. The transmitter of that signal on the door inoperative.
About decompression on 6000',...
.It was a typical media answer even if it were Flight International. The truth can only be that pilots NOTICED by their EARS and /or by cabin pressure control panel that cabin altitude is climbing same as the aircraft altitude, and declared "Loss of Cabin Pressure" to ATC.
Good on you OnurAir!
I am scared to mention or to compare what happened
to one B737 few years ago above Aegean Sea, as we were told for the loss of cabin pressure.