9-S1-7
Virus SW 121
Pilot Operating Handbook
POH-121-00-40-001
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PAGE
SECTION
9
SUPPLEMENTS
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 ex-
piration 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.
SECTION 8: HANDLING,
SERVICING AND MAINTENANCE
8.8
ELT SYSTEM INSPECTION
ELT and RCPI batteries must be inspected in accordance with the Aircraft
Maintenances Manual. The ELT and RCPI batteries must be replaced upon
reaching the date stamped on the batteries, after an inadvertent activation
of unknown duration, or whenever the batteries have been in use for one
cumulative hour.
Inspection / Test
After setting transmitter switch to ARM position, the ELT automatically en-
ters a self-test mode. The self-test transmits a 406 MHz test coded pulse
that monitors certain system functions before shutting off. The test pulse
is ignored by any satellite that receives the signal, but the ELT uses this
pulse to check output power and frequency. Other parameters of the ELT
are checked and a set of error codes is generated if a problem is found.
The error codes are indicated by a series of pulses on the transmitter LED,
remote control panel indicator LED, and alert buzzer.
NOTE:
Regulations require that transmitter tests only be done during the
first 5 minutes of each hour and must not last for more than 3 audio sweeps
(1.5 seconds). If you are at a location where there is an control tower or
other monitoring facility, notify the facility before beginning the tests. Never
activate the ELT while airborne for any reason.
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