What are the consequences for failing fly checks?

[Delrik]

The rules seem frustratingly silent. What happens if a pc fails a hover check, 180 degree turn, etc?

Thanks!

[Starglim]

If you fail a Fly check, you don't accomplish the thing you were attempting to do.

Move less than half speed and remain flying: You don't remain flying. You fall to the ground. Note that Pathfinder doesn't define a maximum distance you can fall in your turn, except that it's certainly more than 500 feet, because you can try to cast a spell as a standard action if you fall more than that distance.

Hover: You don't remain flying. You fall to the ground.

Turn greater than 45 degrees: You don't turn greater than 45 degrees. If you are using wings and fail by 5 or more, you fall to the ground, otherwise you sacrifice 5 feet of movement and can choose to turn up to 45 degrees.

Turn 180 degrees: You sacrifice 10 feet of movement. Otherwise, as for turning >45 degrees.

Fly up at greater than 45 degrees: If you are using wings and fail by 5 or more, you fall to the ground, otherwise you can choose to fly upwards to a maximum of 45 degrees.

[Delrik]

Thanks for the clarification. Where are these rules listed? They are not in the core rule book and I have the 4th printing.

[Michael Loy]

If you fail a roll by 5 or more, and you are using wings to fly, you fall.

Otherwise, it really is completely unclear what happens when you fail. I guess you have to conform to the limitations of what you can accomplish with your check? Like, if you're trying to hover and roll a 13, you have to move, or if you roll a 9, you have to move at least half your speed?

But that's conjecture, if fairly reasonable conjecture. Note that you certainly do not simply fall, unless you are using wings and fail by 5 or more. Rather, you cannot "remain flying at the end of [your] turn", so at the very least you'd have a chance to set down safely.

If you fail a roll to turn more than 45 degrees, I suppose you just can't turn more than 45 degrees during that turn. If you're, say, flying into a wall and need to turn, it's not clear where you go from there. Can you make another Fly check to slow or hover? Or do you just slam into the wall and apply the collision rules?