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Revision A7
P/N 13772-001 7-97
Cirrus Design Section 7
SR22 Airplane Description
batteries contained within the transmitter unit power the ELT
transmitter. The batteries must be replaced at specified intervals
based upon the date appearing on the battery (refer to Airplane
Maintenance Manual).
ELT Remote Switch and Indicator Panel
The ELT remote switch and indicator panel located immediately below
the circuit breaker panel, provides test and monitoring functions for the
ELT. The panel contains a button labeled ON, a button labeled RESET,
and a red LED (light). The red light flashes when the ELT is
transmitting. The ON button is used to test the unit in accordance with
the maintenance manual procedures. The RESET button can be used
to cancel an inadvertent transmission. A 6-volt Lithium battery
mounted in the panel powers the LED. The battery must be replaced
at regular intervals (refer to Airplane Maintenance Manual).
In the event of an accident:
1. Verify ELT operation by noting that the ELT indicator light on the
remote panel is flashing.
2. If possible, access the unit as described below and set the ELT
main transmitter control switch ON.
Portable use of ELT:
a. Remove access at lower aft center of baggage compartment.
b. Disconnect fixed antenna lead from front of unit.
c. Disconnect lead from remote switch and indicator unit.
d. Loosen attach straps and remove transmitter unit and portable
antenna.
e. Attach portable antenna to antenna jack on front of unit.
f. Set main control switch to ON.
g. Hold antenna upright as much as possible.
Revision A7
7-98 P/N 13772-001
Section 7 Cirrus Design
Airplane Description SR22
Hour Meter(s)
Serials 0002 through 1820, 1822 through 1839, and 1841 through
1862: The airplane is equipped with an hour meter located inside the
armrest storage compartment between the pilot and copilot seats.
Recording begins when the BAT 1 switch is ON and either the ALT 1 or
ALT 2 switch is ON.
Serials 0002 through 1601, 1603 through 1643, and 1645 through
1662: 28 VDC for hour meter operation is supplied through the 5-amp
ENGINE INST circuit breaker.
Serials 1602, 1644, and 1663 through 1862: 28 VDC for hour meter
operation is supplied through the 5-amp FUEL QTY / HOBBS circuit
breaker on Main Bus 1.
Serials 1821, 1840, 1863 and subsequent: The airplane is equipped
with two hour meters located inside the armrest storage compartment
between the pilot and copilot seats. The #1 hour meter, labeled
HOBBS begins recording when the BAT 1 switch is ON and either the
ALT 1 or ALT 2 switch is ON. The #2 hour meter records flight time and
is labeled FLIGHT. Recording begins when the airplane reaches a
speed of approximately 35 KIAS and is controlled by a differential
pressure switch connected to the Pitot-static system. 28 VDC for hour
meter operation is supplied through the 5-amp FUEL QTY / HOBBS
circuit breaker on Main Bus 1.
Revision A7
P/N 13772-001 7-99
Cirrus Design Section 7
SR22 Airplane Description
Digital Clock
Serials 0002 through 0434; The airplane is equipped with a 2¼”
Davtron M803 digital clock located on the left instrument panel
immediately outboard of the airspeed indicator. The clock provides
Universal Time (UT), Local Time (LT), Elapsed Time (ET), Outside Air
Temperature (OAT) in ° C or °F, and Voltmeter functions. All features
and functions are selectable from control buttons on the clock face.
The clock receives the OAT signal from a temperature sensor installed
immediately forward of the pilots door. The clock operates on 28 VDC
supplied through the 5-amp ENGINE INST circuit breaker on Main Bus
1. Keep-alive power is supplied through a 5-amp fuse connected to the
airplane Main Distribution Bus in the Master Control Unit (MCU). A
replaceable AA battery is installed to provide up to three years battery
back up.
SEL and CTL Buttons
All time keeping and set functions are addressable using the Select
and Control buttons below the time display. Upon power up the clock
will display Universal Time (UT). Pressing the Select button 3 times
will display Local Time (LT), and Elapsed Time (ET) sequentially.
Pressing the button again will return the display to UT.
Set UT or LT:
Use the Select button to select UT or LT as desired. Simultaneously
press Select and Control buttons (tens of hours LED will flash). Press
Control button repeatedly as required to increment digit to desired
value. Press Select button to select the next digit to be set. After all
digits have been set, press the Select button again to return to the
　
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