Circle around and have a look and tell ATC.
It depends. The pilot is not under any obligation to go down and have a closer look, however contacting the appropriate authority by radio is the best course of action. The pilot really has an enormous amount of authority in these matters. Good judgment is what keeps pilots safe.
A signal/flare device.
Many types of signal exists.
signal, sign, beam, flare, lighthouse, bonfire, watchtower
That's the technical description for a signal flare !
They have an expiration date
hand held red flare
E7 is a flare chute. Why? First of all, LepRecon pilots fly down there, and there are blast doors. It also specifically says, "Chute E7, leading to Tara."
Guide, beam, flare, signal, sign, watchtower, alarm, alert, heliograph, lantern...
The captain used a signal flare to let the lighthouse know they were there.
If its fuel has an oxidizer (oxygen-producing solid fuel) in it like solid rocket fuel, then yes.
Proper procedure for using hand held visual distress signal flare