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Sub-section - 4.05
ABNORMAL PROCEDURES
FAA Approved
Original Issue: Feb 28, 2006
Hawker 850XP Pro Line 21 Airplane Flight Manual
XS 1 or XS 2 FAIL
By use of the AC voltmeter, establish whether supplies are available on the affected busbar.
Proceed as appropriate:
If Supplies Not Available
If failure is in conjunction with an associated inverter failure, one attempt to reset the inverter may
be made:
Inverter (affected side)............................................... STOP momentarily, then START
If inverter resets and the AC bus is restored, flight can be continued.
If inverter does not reset:
Inverter (affected side)............................................... STOP
Continue flight at the pilot’s discretion without the associated AC bus.
If failure is not in conjunction with an associated inverter failure:
No further action. Continue flight at the pilot’s discretion without the associated AC bus.
If Supplies Available
No further action. Continue flight at the pilot’s discretion.
NOTES:
1. Loss of XS 1 will result in the loss of Stall IDENT 1 (refer to STALL WARNING &
IDENTIFICATION procedures - this Sub-section), AOA Indicator, AOA Indexer
Lights, Mach Trim (refer to MACH TRIM FAIL procedures - this Sub-section) and
Autopilot Pitch Trim.
2. Loss of XS 2 will result in the loss of Stall IDENT 2 (refer to STALL WARNING &
IDENTIFICATION procedures - this Sub-section), Ice Detector and Cabin
Pressurization Fan Venturi. Avoid flight in icing conditions. Do not introduce
pressurization air on the ground from either the APU (if installed) or the Main Air
Valves.
and
ELECT
FAIL
XS 1
FAIL
XS 2
or
For Training Purposes Only