Pilot Copes With Failing
Attitude Indicator
The pilot of a Cessna Citation 501
departed in IFR conditions on a clearance that required 6,000 feet as the first
level-off point. At approximately 3,000 feet the yaw damper and autopilot in
heading mode were both engaged. Air traffic controllers issued a climb to FL230
and a turn on course when the pilot sensed a problem: speed rapidly increasing
and the heading indicator spinning too fast for a standard-rate turn. The
Citation’s vertical-speed indicator and airspeed indicator showed a rapid
descent with increasing airspeed, but the attitude indicator did not tell the
same story. The pilot disconnected the autopilot and confirmed that the attitude
indicator had failed. The only instrument the pilot felt sure of was the turn
indicator, which he used to stabilize the aircraft and pull out of a steep dive.
Climbing once again, the pilot managed to break out on top of the clouds and
regain full control of the aircraft. The Citation then proceeded to a VFR
airport recommended by controllers without injury to anyone on board.
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