In wave, in blue hole at cloud level, hole closes, in IMC, then what?

You mention a misleading AH. i have read many accident reports were the last thing a pilot did before losing the aircraft was to cage the gryo, thinking that somehow the instrument was bad when in fact the aircraft was departing. In the clouds is not time to think your gyro is not working. If it is showing an attitude I would trust it.



My plan, tested in clear and admittedly smooth air, has been to open the air brakes and take hands and feet off if either the A/H shows obvious signs of failing or the airspeed increases over a certain level (I plan on 75 knots). A misleading A/H would be far worse than an obviously failed one, because you would be in worse shape before taking this action. However I recently talked to someone who had the A/H in his LX computer fail while in cloud. He kept things steady while rebooting the LX and all was well. I think I would stick to the open the air brakes plan.