Technical data

13773-001
25-60
Page 4 30 Nov 2000
Note: Because the ELT radiates on the emergency frequency, the federal commu-
nications commission allows these tests to be conducted only within the first
five minutes after any hour and limits the tests to three sweeps of the trans-
mitter audio modulation.
(k) Verify that all switches are properly labeled and positioned.
(l) Perform ELT function test. (Refer to 25-60)
(4) ELT Function Test
The following function test must be done to verify that the transmitter, latch circuit, batteries and
associated equipment are operating properly.
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 FAA control tower or other monitoring facility
notify the facility before beginning the tests. Never activate the ELT while airborne
for any reason.
(a) Turn the squelch all the way down (OFF) to hear the sweep tone.
(b) Monitor 121.5 Mhz using the aircraft COM receiver or portable hand-held receiver.
(c) Press “ON” button on the RCPI unit. Verify that the red led flashes. Verify that the audio
sweep tone can be heard on the COM receiver. Push the “RESET” button on the RCPI
unit. The LED should stop flashing and the audio sweep tone should stop.
Note: The red LED on the RCPI will flash on and off indicating the ELT is transmit-
ting should the ELT be accidently activated by turbulence, hard landing, etc.
Should this occur under any conditions other than an accident requiring
immediate assistance, the ELT should be reset by pressing the “RESET”
button on the RCPI unit. If the aircraft is on the ground and the “RESET”
button does not cause the LED to stop flashing the main switch on the ELT
unit should be set to the off position. The aircraft may be operated with the
ELT removed for inspection or repair subject to the conditions of FAR
91.207.
B. ELT and Remote Control Panel Indicator (RCPI) Batteries
(1) Removal - ELT Battery
(a) For instructions on how to remove the ELT battery, refer to ACK Technologies Installation
and Operation Manual (Manual Number 9/94).
C. ELT Remote Control Panel Indicator (RCPI)
(1) Removal - Remote Control Panel Indicator
(a) Remove the two aft screws from circuit breaker panel and open.
(b) Disconnect remote control panel indicator RJ-11 connector.
(c) Remove bolts, washers, and nuts securing the RCPI to the circuit breaker panel.
(d) Remove the RCPI.
(2) Installation - Remote Control Panel Indicator
(a) Secure RCPI to circuit breaker panel with bolts, washers, and nuts.
(b) Connect RJ-11 connector to the Remote Control Panel Indicator.
(c) Secure aft circuit breaker panel with screws.
(3) Removal - Remote Control Panel Indicator Battery