And 121.5 Mhz Transmission Test - Kannad 406 AF-COMPACT Installation Manual

C. 406 and 121.5 MHz transmission test
NOTE: Transmissions tests only provide the aircraft operator with an indication
that the ELT is transmitting; however, a positive result cannot be interpreted as
meaning that the ELT meets all operational parameters.
(1) 406 MHz
This test must be carried out with a COSPAS-SARSAT decoder.
• Perform self-test (Press RESET and TEST on the RCP or switch ELT from
OFF to ARM).
• Check with the COSPAS-SARSAT decoder that, except for the 5th and the
6th digits, the decoded message is identical to the programmed message.
NOTE:The message transmitted during self-test sequence always begins with
FF FE D0 whereas a programmed message begins with FF FE 2F.
Example of message programmed in ELT:
FF FE 2F 53 C3 24 97 38 0B A6 0F D0 F5 20
Example of same message decoded by Cospas-Sarsat Decoder:
FF FE D0 53 C3 24 97 38 0B A6 0F D0 F5 20
(2) 121.5 MHz
This check shall only be conducted during the first five minutes of any UTC,
(co-ordinated universal time) hour, and restricted in duration to not more than
five seconds. Be sure to notify any nearby control tower of your intentions.
This test must be carried out with a VHF receiver (Aircraft VHF receiver may be
used).
• Tune VHF receiver to 121.5 MHz;
• Start transmission:
- either on ELT: ON position;
- or on the RCP: ON position (the ELT shall be in ARM position);
• Listen to the two 121.5 MHz "sweep tones" during not more than the first
five seconds then stop transmission
- either on ELT: OFF or ARM position;
- or on the Remote Control Panel: press TEST and RESET (the ELT shall
be in ARM position).
- continue to listen to 121.5 MHz for a few seconds to ensure that the ELT
does not continue to transmit after the test is terminated.
IMPORTANT: Do not allow test duration to exceed 5 seconds. If the ELT
operates for approximately 50 seconds, a 406 MHz signal is transmitted
and is considered valid by the satellite system.
INSTALLATION MANUAL OPERATION MANUAL INSPECTION LOG
KANNAD 406 AF-COMPACT
(see imporant notice below)
:
PAGE: 303
FEB 01/2008