FAA Approved Airplane Flight Manual Supplement

Hawker Beechcraft King Air 300/300LW 190-00716-02 Rev. 2
Page 60 of 135 FAA APPROVED
FAILED ATTITUDE AND/OR HEADING
(ATTITUDE FAIL AND/OR RED "X" OVER HEADING DISPLAY ON PFD)
This indicates a loss of pitch, roll, and/or heading information from AHRS. Refer to GARMIN
G1000 Cockpit Reference Guide and Pilot’s Guide for additional information. Interference from
GPS repeaters operating inside nearby hangars or magnetic anomalies caused by nearby
structures can cause an intermittent loss of attitude and heading displays while the aircraft is on
the ground. This is usually accompanied by a BOTH ON GPS 1, BOTH ON GPS 2, or LOI
annunciation. Moving the aircraft more than 100 yards away from the source of the interference
should alleviate the condition.
Taxiing the aircraft before a valid GPS position has been acquired can cause attitude and/or
heading display to indicate a failed condition. As soon as the aircraft acquires a valid GPS
position, attitude and heading should return to normal.
DO NOT TAKE OFF WITHOUT VALID, NORMAL ATTITUDE AND HEADING DISPLAYS
In Flight, If Both Sides:
1. Attitude .................................................................................. MONITOR using standby attitude gyro
2. WSHLD ANTI-ICE Switches (Pilot and Copilot).......................................................................... OFF
NOTE
The magnetic compass is erratic during windshield anti-ice and/or air conditioner operation.
With windshield anti-ice OFF, windshield may form fog or frost on the inside surface. The
windshield anti-ice should be turned off only long enough to reference magnetic compass or
the pilot should descent to a warmer altitude if terrain, fuel, and endurance permit.
3. ELEC HEAT ................................................................................................................................ OFF
4. CABIN TEMP MODE switch ....................................................................................................... OFF
5. Heading .................................................................................... MONITOR using magnetic compass
If in RVSM airspace:
6. Altitude ........................................ MONITOR AND MAINTAIN ASSIGNED ALTITUDE MANUALLY
Record each altimeter reading for contingency procedure use
NOTE
The standby altimeter must be corrected for position error using the Altimeter Correction –
Standby System chart in the Performance section of this supplement.
7. Advise ATC of loss of autopilot system. Perform appropriate RVSM contingency procedures for
loss of altitude hold capability, outlined in the operator’s RVSM procedures manual.
8. Land as soon as practical.
WARNING