Learjet 60 - Static Source Switch

Learjet 60

Pilot's Manual
STATIC SOURCE SWITCH
The STATIC SOURCE switch controls solenoid-operated
shutoff
valves, in the static plumbing, to assure accurate
static pressure sens-
ing in the event one of the pitot-static probes
become inoperable or
unreliable . The STATIC SOURCE switch,
located on the pilot's switch
panel, has three positions : L, BOTH, and R . When the switch
is in the
BOTH position all four shutoff valves are de-energized open and
stat-
ic pressure for the air data instruments and equipment is available
from static ports in both pitot-static probes . Normally, the
switch is in
the BOTH position for all operations . When the switch is
set to L or R,
the shutoff valves for the opposite pitot-static probe
are energized
closed, and static pressure will be supplied by the selected pitot-static
probe only .
STANDBY PITOT-STATIC SYSTEM
The standby pitot-static system is
independent of the primary system
and supplies pitot-static pressure
to the standby Mach/airspeed
indi-
cator and the standby altimeter
. The standby pitot-static
probe is lo-
cated on the right side of
the nose compartment .
This probe contains
a pitot (impact
pressure) port and two static
pressure ports . The
standby pitot-static probe
contains an electrical
heating element con-
trolled by the R PITOT
HEAT switch . Two
drain valves, located
near
the nose gear doors,
are installed at the
system low spot to
drain
moisture from the
system .
STANDBY
MACWAIRSPEED
INDICATOR
STANDBY
ALTIMETER
PITOT
STATIC
STANDBY STATIC PRESSURE
® STANDBY PITOT PRESSURE
Standby
PnottStatic
Probe
STATIC 2
STANDBY PITOT-STATIC
SYSTEM
SCHEMATIC
Figure
5-7
PM-123
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