Saab 340B, Operation Manual

Page: 395 / 670

EMERGENCY EQUIPMENT
Emergency Locator Transmitter
Aircraft Operations Manual
6/7.1
S1
PAGE 1
Apr 01/15
A/C 160 − 170
1. GENERAL
The Emergency Locator Transmitter (ELT) facili-
tates search and rescue in case of a crash landing.
It activates automatically on impact, transmitting on
civil as well as military aeronautical distress fre-
quencies (121.5 and 243 MHz).
It is located aft of the cargo compartment, and is
removable from the aircraft.
2. DESCRIPTION
The ELT operates independent of the aircraft batter-
ies. It is waterproof, crash resistant, and will nor-
mally be operative after a crash landing.
At a 5 − 7 G nominal impact, the ELT automatically
activates, transmitting an emergency signal contain-
ing 2
− 4 downsweep (1,600 − 300 Hz) signals per
second. The self − contained battery has a minimum
capacity of 52 hours of transmission.
There are two antennas: a permanent external on
the tail cone and a blade antenna for portable ELT
use.
The ELT is controlled by an internal impact switch
and an ELT switch on the transmitter front panel.
Remote control of the ELT is possible by way of a
two
− position (ON − ARMED) switch on the cockpit
overhead EMERGENCY panel.
3. OPERATION
3.1 Automatic activation
For normal operation, the ELT switch in cockpit
shall be guarded in ARMED position. The ELT will
then activate automatically on impact.
3.2 Manual activation
The ELT can be purposely activated by setting the
ELT switch in cockpit to ON.
3.3 Deactivation
Should the ELT be inadvertently activated, gain ac-
cess to the transmitter, set its front panel ON
− OFF −
ARM switch to OFF, depress the RESET pushbut-
ton and set the ON
− OFF − ARM switch to ARM. To
prevent unnecessary search − and rescue actions,
inform ATC immediately. Also, make an entry in the
aircraft log book.
3.4 Portable operation
It is not normal procedure to bring the ELT along in
an evacuation. Should, however, circumstances
warrant the effort of removing the ELT, the portable
operation is the following:
− Gain access to the ELT through the access panel
aft of the cargo compartment.
− Set the ELT switch to OFF.
− Disconnect the antenna cable and tear loose the
two cables to the remote selector circuit.
− Remove the ELT from its mounting bracket.
− Extend the blade antenna fully by pulling the
plastic end of the antenna.
The ELT is now ready for portable use and will
transmit whenever the ELT switch is in the ON posi-
tion.
For maximum radio range, the ELT should be lo-
cated as high as possible above the surrounding
terrain, e.g. on a hill top or in a tree. The antenna
should be oriented vertically.
At low temperatures, keep the transmitter inside
your jacket with the antenna outside.
IMPORTANT: To prevent unnecessary search − and
rescue actions, inform ATC immediately if the ELT
has been switched on inadvertently.