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Pilot’s Operating Manual
Revision A1: Nov, 2002
Hawker 800XP Pro Line 21
Section VII - SAFETY INFORMATION
equipped for IFR flight, cannot be flown safely into conditions such as thunderstorms, tornadoes,
hurricanes or other phenomena likely to produce severe turbulence, airplanes equipped for flight in icing
conditions cannot be expected to cope with “severe” icing conditions as defined by the National Weather
Service. The prudent pilot must remain alert to the possibility that icing conditions may become “severe”
and that his equipment will not cope with them. At the first indication that such condition may have been
encountered or may lie ahead, he should immediately react by selecting the most expeditious and safe
course for diversion.
Even though the pilot exercises normal precautions for operating in icing conditions, ice is still likely to
build up on unprotected areas, and may not be directly observable from the cockpit. Under some
atmospheric conditions, it may even build up aft of the de-iced areas despite the timely use of deice/
anti-ice procedures.
The effect of ice accumulation on any unprotected surface is aggravated by length of exposure to the
icing conditions. Ice buildup on unprotected surfaces will increase drag, add weight, reduce lift, and
generally, adversely affect the aerodynamic characteristics and performance of the airplane. It can
progress to the point where the airplane is no longer capable of flying.
Therefore, the pilot operating even a fully-equipped airplane in sustained icing conditions must remain
sensitive to any indication, such as observed ice accumulation, loss of airspeed, the need for increased
thrust, reduced rate of climb, or sluggish response, that ice is accumulating on unprotected surfaces.
Continued flight in these conditions is extremely hazardous, regardless of the performance of the de-
icing/anti-icing equipment.
Since flight in icing conditions is not an everyday occurrence, it is important that you maintain a proper
proficiency and awareness of the operating procedures necessary for safe operation of the airplane and
that the airplane is in a condition for safe operation.
Ensure moisture drains in the airplane structure are maintained open as specified in the Maintenance
Manual, so that moisture will not collect and cause freezing in the control cable area. Also control
surface tab hinges should be maintained and lubricated as specified in the Maintenance Manual.
In icing conditions the autopilot should be disengaged at an altitude sufficient to permit the pilot to gain
the feel of the airplane prior to landing. In no case should this be less than the minimum altitude
specified in the Airplane Flight Manual.
Observe the procedures and limitations set forth in the FAA Approved Airplane Flight Manual during
operation in icing conditions. Activate your deice and anti-icing systems before entering an area of
moisture where you are likely to go through a freezing level.
