FAA Approved Airplane Flight Manual Supplement

Hawker Beechcraft King Air 300/300LW 190-00716-03 Rev.4
Page 142 of 167
STATIC
The normal static system has two separate sources of static air. One source is connected to the pilot’s Air
Data Computer (ADC1), and the other is connected to the copilot’s Air Data Computer (ADC2) and the
standby instruments. Each of the normal static air lines opens to the atmosphere through two static air
ports—one on each side of the aft fuselage, four ports total.
An alternate static air line is also provided for the pilot’s Air Data Computer (ADC1). In the event of a
failure of the pilot’s normal static air source (e.g., if ice accumulations should obstruct the static air ports),
the alternate source can be selected by lifting the spring-clip retainer off the PILOT’S EMERGENCY
STATIC AIR SOURCE valve handle, located on the right side panel, and moving the handle aft to the
ALTERNATE position. This will connect the alternate static air line to the pilot’s Air Data Computer
(ADC1). The alternate line is open to the unpressurized area just aft of the rear pressure bulkhead.
When the alternate static air source is not needed, ensure that PILOT’S EMERGENCY STATIC AIR
SOURCE valve handle is held in the forward (NORMAL) position by the spring-clip retainer.
THE PILOT’S AIRSPEED AND ALTIMETER INDICATIONS CHANGE WHEN THE
ALTERNATE STATIC AIR SOURCE IS IN USE. REFER TO THE AIRSPEED
CALIBRATION – ALTERNATE SYSTEM, AND THE ALTIMETER CORRECTION –
ALTERNATE SYSTEM GRAPHS IN SECTION 5, PERFORMANCE, OF THE
AIRPLANE’S ORIGINAL PILOT’S OPERATION HANDBOOK AND FAA
APPROVED AIRPLANE FLIGHT MANUAL FOR OPERATION WHEN THE
ALTERNATE STATIC AIR SOURCE IS IN USE.
There are three drain petcocks for draining the static air lines located below the side panel on the right
sidewall behind an access cover. These drain petcocks should be opened to release any trapped
moisture at each inspection interval or after exposure to visible moisture on the ground, and must be
closed after draining.
For RVSM compliant aircraft that operate in RVSM airspace, special care must be taken when inspecting
the static ports and surrounding regions during preflight inspection. The static port openings should be
smooth and round, and free of foreign material. The fuselage skin in the RVSM critical region, which is
defined by markings in the vicinity of the static ports, should have no skin defects, physical damage, or
large gaps and steps in the skin surface caused by improperly seated access panels or hatches.
GROUND COMMUNICATIONS
Ground communication is provided by the G1000 system by turning ON the airplane’s battery. COM 1
and the pilot’s audio panel will be powered. The pilot may use the airplane’s speaker and hand
microphone or a headset for communication.
WARNING