Hi! I'm from the Philippines (this will be relevant, I promise) and I have just started to play the flute and I'm taking lessons online. I got my flute second hand, and I think it needs some repair (the F note won't sound and I think I see some rust under there).
But I'm new to this, and I don't really know anyone who can direct me to a flute specialist/repair shop here in the Philippines (specifically Manila).
if they are airy or won't sound, then odds are there's few issues, was hoping it may just be a screw turn and your all up and going again.
Just as a last check, when you finger g, does g2 close as well (that is the other half of the g key), if you see it closes as well, then you will need to visit someone to get it repaired, if it doesn't close then it may still be just a screw adjustment