Someone may know how to microwave their breakfast every day but not have a frikin clue what to do when it pops a c/b. Flight crew has the responsibility of making the call, so yes send Jr. back to have a look. If the F/O is unsure BACK TO THE GATE!

Hmmm.... Surely your airline has protocol for these situations? Mine does. Don't most moderns airliners have indicators inte flight deck anyway if all doors are armed or not?

Have a look at the MEL? It will probably allow dispatch with one (or maybe more, depending on type) door u/s with no slide, possibly with some restrictions on how many pax are seated where. If the engineering action required is to write "door 1L stuck in manual" in the tech. log, then I'd be tempted to brief the CC/pax not to use 1L in an evacuation then carry on...

I've opened a door (A330) and had a door opened (B744) several times after push back, its always been FOD in the girt bar brackets preventing the respective slide being armed. I've even got photos in my phone to show the F/O where and what to look for, as said its not something we do regularly.

There will always be some different opinions about this.

I'm guessing you just have to weigh the pros / cons.

One would be tempted to just have someone open the door and have a look for foreign object. Saves the "hassle" of request to return and have the engineer sign it off for a "simple" foreign object found under seal.

The chances of someone actually fall off while the parked aircraft door is being opened (plz no crazy stunts like opening a door while u still being pushed) is very remote but can't be totally disregarded. Not to mention it might not go down too well with the reporters (if any are onboard).

At the end of the day, that's why they pay captain a huge salary to make the calls. It's not just "my radios, read ecam" everytime.