SkyHunter406 SKYHUNTER 406 HF - Manual (Page 44)

MANL:INS:SH:X:XX August 8 ,2013
Rev 25
8-1
8 MAINTENANCE
8.1 CANADA
The described maintenance steps below meet the requirements of the Canadian Aviation
Regulations for annual performance check. These checks must be performed annually.
8.2 MAINTENANCE STEPS
These steps are used to comply with the above regulations.
8.2.1 Corrosion Inspection
Due to the possibility of exposure to extreme environmental conditions the SkyHunter 406 TM ELT
is to be inspected for corrosion upon every performance test and battery replacement.
8.2.2 Operational Testing
Tests are only to be performed during the first 5 minutes of any UTC hour and should not last
for more than 5 seconds. This test will only indicate if the ELT is transmitting on 121.5 Mhz and
NOT 406 Mhz and can be done at the operator’s discretion.
Turn the ELT “ON” and listen on a VHF receiver tuned to 121.5MHz for approximately 3 sweeps
then switch the ELT back to the “ARM” or “ARM” position. Monitor 121.5MHz to be sure the
sweep stops after the test has been completed.
NOTE: Operational Testing in this manner does not identify if your ELT is operating within ALL
operating parameters. Refer to the Self Test section of this manual for additional 406 Mhz
operational testing.
8.2.3 Performance Testing
Performance Testing is practiced annually by a certified avionics shop with proper equipment.
The ELT should be under power with its battery pack unless lengthy servicing is expected. An
alternate power source will be acceptable under those circumstances. After passing these
parameters the date the test was passed will be marked in a permanent manner on the outside
of the ELT.
8.2.4 Measuring peak power after 3 minutes of operation
The ELT must be in a screen room or metal enclosure. Output power may be measured using a
suitable Spectrum Analyzer or beacon tester connected to the output BNC connector of the ELT.
Using a suitable impedance matching device confirm that the power levels are above the
minimum acceptable found in the specifications outlined in Section 4. The 121.5MHz signal is
present and active except when the 406MHz signal is active.
8.2.5 Measuring the frequency after 3 minutes of operation
Leaving the ELT configured as in the previous step measure both frequencies. The 406MHz
signal will only be on for 520ms approx. every 50 s. Confirm the frequencies are within the
limits set out in the specifications outlined in section 4.