Page 44
Sub-section - 4.05
ABNORMAL PROCEDURES
FAA Approved
Original Issue: Feb 28, 2006
Hawker 850XP Pro Line 21 Airplane Flight Manual
AVIONICS SYSTEMS
(continued)
Single AHRS Failure
AHRS circuit breakers ................................................Check
(DA-A - E18, E19, F18 or F19)
AHS reversion switch .................................................Select operative AHRS
• The autopilot and yaw damper will disconnect and will no longer function.
• TCAS is functional, but relative bearing to the displayed targets may not be accurate.
• Weather radar stabilization will be inoperative.
• AHRS comparators will be inoperative.
Dual AHRS Failure
AHRS circuit breakers ................................................Check
(DA-A - E18, E19, F18 or F19)
Use Electronic Standby Instrument System and land at the nearest suitable airport.
• The autopilot and yaw damper will disconnect and will no longer function.
• TCAS is functional, but relative bearing to the displayed targets may not be accurate.
• Weather radar stabilization will be inoperative.
Single CDU Failure
CDU circuit breakers ..................................................Check (DA-A - E13, E14 or F13)
CDU reversion switch .................................................Select operative CDU
Dual CDU Failure
CDU circuit breakers ..................................................Check (DA-A - E13, E14 or F13)
EMERG RADIO..........................................................On (located above DA-A circuit
breaker panel).
NOTES:
1. Only VOR 1 and COMM 1 will be available and frequency tuning must be made
using the CTL-23 control.
2. The EMERG RADIO switch will only function if PE power is available.
CVR Failure (CVR FAIL Annunciator Illuminated)
Correct prior to flight or before the next flight if annunciator illuminates during flight.
Continued Next Page
For Training Purposes Only