Pipistrel Virus SW 121, Pilot Operating Handbook

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9-S1-8
PAGE
Virus SW 121
Pilot Operating Handbook
POH-121-00-40-001
PAGE REV. 0
SECTION 9
SUPPLEMENTS
Operators may wish to use a low quality AM broadcast receiver to deter-
mine if energy is being transmitted from the antenna. When the antenna of
the radio (tuning dial on any setting) is held about 6 inches from the activat-
ed ELT antenna, the ELT aural tone will be heard on the AM broadcast re-
ceiver. This is not a measured check, but it does provide confidence that the
antenna is radiating sufficient power to aid search and rescue. The aircraft’s
VHF receiver, tuned to 121.5 MHz, may also be used. This receiver, however,
is more sensitive and could pick up a weak signal even if the radiating ELT’s
antenna is disconnected. Thus it does not check the integrity of the ELT sys-
tem or provide the same level of confidence as does an AM radio.
1 Tune aircraft receiver to 121.5 MHz.
2
Turn the ELT aircraft panel switch “ON” for about 1 second, then
back to the “ARM” position. The receiver should transmit 3 audio
sweeps.
3
At turn-off (back to ‘ARM’ state) the panel LED and buzzer should
present 1 pulse. If more are displayed, determine the problem from
the list below.
Codes displayed with the associated conditions are as follows:
1 FLASH : Indicates that the system is operational and that no error
conditions were found.
2 FLASHES : Not used. If displayed, correct condition before further
flight.
3 FLASHES : Open or short circuit condition on the antenna output or
cable. If displayed, correct condition before further flight.
4 FLASHES : Low power detected. If displayed, correct condition
before further flight.
5 FLASHES : Indicates that the ELT has not been programmed.
Does not indicate erroneous or corrupted programmed data. If dis-
played, correct condition before further flight.
6 FLASHES : Indicates that G-switch loop is not installed.
If displayed, correct condition before further flight.
7 FLASHES : Indicates that the ELT battery has too much accumu-
lated operation time (> 1hr). If displayed, correct condition before
further flight.