ARTEX PRODUCTS / ACR ELECTRONICS, INC
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
B406-4 (453-5004)
Page 34 of 70
25-62-03
b)
The left hand example in Figure 10 Short and Long 406 MHz Message Examples is an ELT
programmed for “User Protocol ELT with Serial Number”, with a tes
t Hex ID. The right hand example
is an ELT programmed for “Standard Location Protocol ELT with Serial Number”.
c)
Actual messages will vary depending on the protocol and information programmed into the ELT.
d)
If the ELT is programmed with a location (long message) protocol and disconnected from the
ELT/NAV Interface -
B, the message will indicate “Position Invalid” in lieu of position data, as shown
in the right hand example in Figure 10 Short and Long 406 MHz Message Examples.
Figure 10 Short and Long 406 MHz Message Examples
5)
Repeat the activation and deactivation cycle if the ETS fails to read the message on the initial try. The
406 MHz oscillator may not be warmed up. If continued attempts to read the message fail, check for
self-test error codes and refer to Table 6 on page 37.
SUBTASK 25-62-03-750-011
P.
ELT Reset Check
–
Item 5h
1)
Place the ELT control switch in the “ON” posi
tion.
2)
Return the
switch to the “OFF” position.
3)
If the ELT is working properly, the LED will stay on for approximately 1 second and then turn off. If a
series of flashes are displayed, refer to Table 6 on page 37.
NOTE:
A 5-flash error indication will occur if the ELT is programmed with a location protocol, since
no navigation input data is present.
SUBTASK 25-62-03-750-012
Q.
Installed Transmitter Test
–
Item 6
CAUTION: DO NOT ALLOW THE DURATION OF THIS TEST TO EXCEED 5 SECONDS. THE ELT WILL
TRANSMIT A 406 MHZ SIGNAL AFTER THE ELT IS ACTIVATED FOR APPROXIMATELY 47
SECONDS. THE COSPAS-SARSAT SATELLITE SYSTEM WILL CONSIDER THE 406 MHZ
TRANSMISSION TO BE A VALID DISTRESS SIGNAL.
1)
Reinstall the ELT battery pack. See SUBTASK 25-62-03-450-001 on page 60.
2)
Reinstall the ELT. See SUBTASK 25-62-03-410-001 on page 58.
3)
Perform the following functional check within the first 5 minutes after the hour (UTC), as required by AC
43.13-1, Chapter 12, § 12-22, Note 3.
4)
Notify any nearby control tower of your intentions.
5)
Tune a receiver, usually the aircraft transceiver, to 121.5 MHz.
NOTE:
An AM radio may be used to receive the signal.
6)
Monitor the LED on the ELT during this test.