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inertia “G” switch will activate automatically. However, to turn
the ELT OFF and ON will require manual switching of the main
control switch located on the ELT unit.
1. ELT Remote Switch .........................................................Verify ON
• Switch the ELT Remote Switch ON even if the red LED
annunciator is flashing.
• If airplane radio operable and can be safety used (no threat of
fire or explosion), turn radio ON and select 121.5 MHz. If the
ELT can be heard transmitting, it is working properly.
2. Battery Power ..................................................................Conserve
• Do not use radio transceiver until rescue aircraft is sighted.
After sighting rescue aircraft:
3. ELT Remote Switch ................................................ “ARM” position
to prevent radio interference.
• Attempt contact with rescue aircraft with the radio transceiver
set to a frequency of 121.5 MHz. If no contact is established,
switch the panel mounted switch to the 'ON'-position
immediately.
(Continued on following page)
Revision 01: 12-18-08
4 of 8 P/N 11934-S36
Section 9 Cirrus Design
Supplements SR20
Portable Use of ELT
The ELT transmitter can be removed from the airplane and used as a
personal locating device if it is necessary to leave the airplane after an
accident. Access the unit as described below and set the ELT
transmitter control switch to the 'ON'-position.
1. Remove avionics bay access panel along the aft portion of the RH
fuselage or the lower aft center access panel of baggage
compartment.
2. Disconnect fixed antenna lead from front of unit.
3. Disconnect lead from remote switch and indicator unit.
4. Disconnect antenna from mounting tray.
5. Loosen attach straps and remove transmitter unit.
6. Attach antenna to antenna jack on front of unit.
7. Set main control switch to ON.
8. Hold antenna upright as much as possible.
Section 4 - Normal Procedures
No Change.
Section 5 - Performance
No Change.
Section 6 - Weight & Balance
Installation of the subject propeller adds the following optional (Sym =
O) equipment at the weight and arm shown in the following table.
ATA /
Item Description Sym Qty Part Number Unit
Wt Arm
25-01 Artex ME406 ELT and Batteries O 1 17190-100 3.4 229.5
Revision 01: 12-18-08
P/N 11934-S36 5 of 8
Cirrus Design Section 9
SR20 Supplements
Section 7 - Systems Description
This airplane is equipped with a self-contained Artex ME406 406 MHz
ELT System. The transmitter unit is automatically activated upon
sensing a change of velocity along its longitudinal axis exceeding 4 to
5 feet per second. Once activated, the transmitter transmits VHF band
audio sweeps at 121.5 Mhz until battery power is gone. In addition, for
the first 24 hours of operation, a 406 MHz signal is transmitted at 50-
second intervals. This transmission lasts 440 ms and contains
identification data received by Cospas-Sarsat satellites. The
transmitted data is referenced in a database maintained by the
national authority responsible for ELT registration to identify the
beacon and owner.
The ELT transmitter is installed immediately behind the aft cabin
bulkhead, slightly to the right of the airplane centerline. The transmitter
and antenna are accessible through the avionics bay access panel
along the aft portion of the RH fuselage or the lower aft center access
panel of baggage compartment. The main transmitter control switch is
labeled “ON” - “ARM”. The transmitter is in the armed position for
normal operations. A red LED annunciator flashes when the ELT is
transmitting. A battery pack consisting of two “D” cell lithium batteries
mounts to a cover assembly within the transmitter to provide power to
the transmitter. The expiration date of the batteries are indicated on
the outside of the ELT battery case and recorded in the aircraft logs.
A warning buzzer is mounted to the transmitter mounting tray. When
the ELT is activated, the buzzer “beeps” periodically. This buzzer
operates in tandem with the ELT panel indicator and serves as a
redundant annunciation. Power to the buzzer is supplied by the ELT
batteries.
Serials 1005 thru 2015; The ELT Remote Switch and Control Panel
Indicator (RCPI) is located below the circuit breakers on the circuit
breaker panel or Serials 2016 and subsequent, below the Alternate
Induction Air Control knob near the pilot’s right knee.
The RCPI provides test and monitoring functions for the transmitter.
The panel contains a switch labeled “ON” - “ARM”, and a red LED
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Cirrus Design SR20西锐20飞行员操作手册和飞机飞行手册附录(40)
