This includes partial-panel flight because in many cases, loss of the primary attitude and/or heading indicators
will disconnect the autopilot, leaving you to go from monitoring a coupled approach to identifying a failed instrument and transitioning to partial panel hand-flying while still flying the procedure to a landing or a missed approach--a recipe for disaster if you're not very sharp flying by hand.
From a technical standpoint, the main thing that differentiates the $2449 G5 heading indicator
from the $2195 G5 attitude indicator is a remote heading sensor.
Then check the turn coordinator/turn and bank and the heading indicator
. If two indicators agree, then it's a good bet the third has failed.
If you were lucky--or wealthy--enough to have an RMI (remote magnetic indicator), which was really nothing more than that bearing pointer on a compass card that, instead of merely being fixed or manually adjustable, was slaved to your heading indicator
, life got a whole lot easier.
The D1's heading indicator
rotates in arc format and a magenta turn rate arc projects in the direction of the turn.
Reset your heading indicator
to 360 and adjust your correction inbound until you've got the freeze angle.
The PAI-700 mimics the presentation of a heading indicator
, which takes the guesswork out of compass turns.
Line up precisely on the centerline of the runway, don the view limiting device (with your trusty CFII by your side, of course), ease in the throttle and keep the heading indicator
locked on runway heading as you accelerate to liftoff speed and climb out.
Call it, "The Lost Art of Cross Check." While I've had only one AHRS failure, I've lost three conventional attitude indicators and one vacuum pump that took both the AI and heading indicator
. Two of those failures were in actual IMC.
After a long week of work and travel planning, we launched late in the afternoon on a Friday and I put the heading indicator
Finally, the HSI compass card can be slaved to a magnetic sensor or non-slaved like your basic heading indicator
Fail the heading indicator
and it just locks in place.