King Air C90GTi, Руководство по подготовке пилотов

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Figure 16-54. Static Ports
In addition, an alternate static air source is
provided to the pilot’s static air source valve
from the aft side of the rear pressure bulkhead.
The output from the pilot’s static air source
valve is manually selected by the crew and
provides either normal static air pressure or al-
ternate static air pressure to the pilot’s ADC
and standby unit ADC. During preflight, the
pilot should ensure the PILOT’S STATIC AIR
SOURCE valve switch is held in the NOR-
MAL (forward) position by the spring-clip re-
tainer (Figure 16-55). See Figure 16-56 to see
the connections from pitot-static lines to the
ADC’s for pilot and copilot and the ADC for
the SFDS.
Figure 16-55. Alternate Static Source
Selection
The pilot’s ADC receives an input (discrete)
when the alternate static source selector is
moved to the “Alternate” position and auto-
matically applies alternate static source cor-
rections. The pilot must not apply corrections
from the performance tables. The pilot’s ADC
automatically returns to normal operation
when the alternate static source selector is
moved to the “Normal” position.
The standby unit ADC also receives alternate
static source air when the selector is moved to
the “Alternate” position. Unlike the pilot’s
ADC, the standby unit ADC does not auto-
matically apply corrections and the pilot must
use appropriate corrections from the perform-
ance tables. Moving the switch back to the
“Normal” position will allow normal pitot/sta-
tic air to return to the standby unit ADC.
The copilot’s ADC only receives normal
pitot/static air. It does not have a connection
to the alternate system.
OUTSIDE AIR
TEMPERATURE
The digital outside air temperature (OAT)
gage is located on the left sidewall, and dis-
plays Indicated Outside Air Temperature
(IOAT) in Celsius (Figure 16-57). When the
adjacent button is depressed, Fahrenheit is dis-
played. The probe is located on the lower fuse-
lage under the pilot’s position. Indicated
Outside Air Temperature (IOAT) is a combi-
nation of Static Air Temperature (SAT) and
temperature due to air friction across the
probe. This is referred to as Ram Air Temper-
ature (RAT) or Total Air Temperature (TAT).
For determination of actual OAT, refer to the
Indicated Outside Air Temperature Correc-
tion – ISA chart in the Performance section of
the POH/AFM. This sidewall OAT gage must
be used for performance computations.
The Ram Air Temperature (RAT) and Static
Air Temperature (SAT) indications are lo-
cated at the bottom of the PFD and MFD re-
spectively. Information is derived from the Air
Data Computers. This input comes from a
Rosemont probe located behind the nose gear
well area on the underside of the fuselage. This
is an unheated probe as is the OAT gauge
probe (Figure 16-58).
FOR TRAINING PURPOSES ONLY
16-28
KING AIR C90GTi/C90GTx PILOT TRAINING MANUAL
16
A
VIONICS