Page 2-8
Pilot’s Operating Manual
Revision A1: Nov, 2002
Sub-section 2
ABNORMAL HANDLING
Hawker 800XP Pro Line 21
Section V - FLIGHT HANDLING
BEFORE TAKE-OFF
Prime the airframe ice protection system by setting the WING/TAIL ANTICE time switch to run the pump
for two minutes. Check that priming is complete before start of takeoff.
If the outside air temperature is 10° C or below and is associated with conditions of high humidity, i.e.,
mist or fog reducing visibility to approximately 1 mile (1600 meters), or with a wet runway surface, set
ENG ANTICE 1 and 2 and ENG IGNITION 1 and 2 to ON.
NOTE: ENG ANTICE 1 and 2 should be selected ON before setting take-off thrust.
When take-off is made with ENG ANTICE 1 and 2 selected ON, ITT must be monitored during takeoff
and initial climb. Allowance must be made for the use of ENG ANTICE on performance by reference to
the appropriate figures in the Airplane Flight Manual, Sub-section 4.10 and Section 5. If necessary, the
airframe WING/TAIL ANTICE switch may also be selected on for takeoff. Switch ENG ANTICE 1 and 2
to OFF and the ENG IGNITION 1 and 2 to off when conditions permit.
NOTE: There is a fuel penalty when the engine antice systems are in use.
Whether in icing conditions or not, the SCREEN HEAT L and R and the PITOT/VANE HEAT L and R
should be selected ON in flight. The ICE DET switch should normally be set to AUTO, but before taxiing
in icing conditions, it should be set to OVRD.
IN FLIGHT
Maintain the airframe system in the fully primed condition (see NOTE 1).
If icing conditions are present or expected during flight, proceed as follows:
ENG IGNITION 1.................................................................. ON
ENG ANTICE 1 .................................................................... ON
WING/TAIL ANTICE............................................................. Select before entering icing and
set for 10 minutes.
(see NOTES 1 and 2)
Airspeed ............................................................................... Adjust airspeed to 230 KIAS.
(see NOTE 3)
ENG IGNITION 2.................................................................. ON
ENG ANTICE 2 .................................................................... ON
ENG 1 & 2 A/ICE annunciators ............................................ Extinguished
(monitor during flight in icing
conditions)
NOTES:
1. The airframe system should be maintained fully primed by selecting it on for 30 seconds
at the start of climb, for 2 minutes at the top of descent, and, if icing conditions are
expected, preferably for 2 minutes prior to entering icing conditions.
2. If icing conditions still prevail or are expected, a further period of operation should be
selected prior to the time switch reaching zero. Termination of the WING/TAIL ANTICE
selection will be given by an audio chime.
