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seconds, then OFF; then feeling each element during the external inspection. Ground operation of
the pitot-static heat should be limited to less than two minutes to avoid damage. Failures of pitot and
static heating elements are annunciated by the P/S HTR L-R message. Failure of the stall warning
heating element is annunciated by the STALL WARN HTR CAS message.
RAIN REMOVAL
Windshield rain removal is provided by a passive rain repellent coating on the external windshield
surface.
WATER / SLUSH OPERATION
The airplane has been demonstrated to safely operate in standing water/slush depths up to 0.50
inch. Refer to Section VII for corrections to takeoff and landing data.
WARNING
Takeoff and landing distances will be significantly influenced by
standing water, slush, snow, or ice on the runway.
NOTE
The following procedure may be followed to help remove slush and/or frozen water
from the landing gear. If able, do not immediately retract the gear to allow centrifugal
force and airflow to remove excess fluid and slush. After initial gear retraction, extend
and retract the gear one additional time.
COLD WEATHER OPERATIONS
Airplane power-up, engine starts, and subsequent ground operations have been demonstrated
following cold soak to -40°C (-40°F). Cold soak is defined as a continuous period of longer than 2
hours, at surface temperatures below -15°C (+5°F), during which the airplane is parked without
engines and systems operating. If prolonged cold soak is anticipated, refer to maintenance manual
procedures to prepare the airplane for the cold soak. Following a cold soak, refer to maintenance
manual procedures to prepare the airplane for flight.
The following operational procedures are recommended if the airplane is anticipated to be exposed
to cold soak.
(Continued Next Page)
510FM-07 AA 3-155
SECTION III - OPERATING PROCEDURES MODEL 510
NORMAL PROCEDURES
FAA APPROVED
U.S. Configuration
COLD WEATHER OPERATIONS (Continued)
COLD SOAK PREPARATION
1. Remove EROS crew oxygen masks if temperature will be less than 0°C (+32°F), and drain
all cabin fluids.
2. Chock airplane wheels, as parking brake may bleed down during cold soak.
3. When the airplane is parked in any conditions of falling or blowing snow, regardless of
temperature, the engine and pitot covers should be installed. The airplane should be parked
with flaps retracted. Prior to flight, the airplane must be cleared of snow and if wing,
empennage, or control surfaces are frosted, they must be deiced.
4. The airplane battery should be moved to a warm environment, or battery heater installed
and connected. Below -20°C (-4°F), battery may be inert and will not charge or discharge.
5. Consider placing passenger seats in takeoff position prior to cold soak. After cold soak,
seats are more difficult to reposition.
6. If excessive snowfall or other frozen precipitation is expected, secure the aircraft
referencing the Weight and Balance manual as required to ballast the aircraft forward.
POST COLD SOAK PREFLIGHT
1. Service fluids, pneumatics, and systems as required for flight.
2. Reinstall crew EROS oxygen masks and verify operation after cabin temperatures have
warmed above 0°C (+32°F).
3. Reinstall aircraft battery (if removed). Consider use of a GPU after extended cold soak.
4. Reference Section VII of the AFM for ground de-ice procedures.
The following operational procedures are recommended after cold soak:
Hydraulic accumulators, pneumatic storage bottles, and oxygen cylinders will indicate a lower
pressure because of the temperature drop. Refer to the appropriate temperature charge placards. It
should be noted that hydraulic and pneumatic systems are more prone to leaks in extreme cold. A
significantly lower charge may indicate a leak.
Operating in extremely cold temperatures super cools and reduces the solubility of any water
particles in the fuel, increasing the possibility of fuel system icing. The tank sump drains should be
drained frequently and thoroughly. It is possible for water to settle in the sump and freeze, which
would block the drain. If this occurs, heat should be applied safely until fuel flows freely. Maintain
heat after flow begins to make sure that all particles have melted. Collect the drainage in a clear,
clean container to inspect for water globules.
WARNING
Improper heating of the fuel system represents an extreme fire danger.
Do not attempt to heat the fuel system using an electric open element
space-type heater or a flame-fired space-type heater.
NOTE
It is preferred to move the airplane to a heated hanger or shelter if fuel system icing is
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Citation Mustang airplane flight manual 1(106)
