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2.2.5
Audible Monitor Location and Installation:
A warning buzzer is required for TSO-C126 approval. The buzzer (P/N 451018) is
powered by the ELT system and, therefore, independent of the aircraft power system.
When the ELT is activated, the buzzer 'beeps' periodically. The time between pulses
lengthen after a predetermined transmitter 'on' time. While the buzzer may be located
anywhere on the aircraft, it is recommended that the buzzer be placed in the cockpit,
near to the Remote Switch Unit. This buzzer operates in tandem with the ELT panel
indicator and would serve as a redundant indicator.
Note:
RTCA/DO-204 indicates installation in the cockpit.
The buzzer can be mounted on the instrument panel, using the plastic bezel nut.
Suggested mounting is with the buzzer orifice with an open hole on the instrument
panel, adjacent to the Remote Switch Unit. The 2 mounting ears at its base may be
used as an extra optional mounting secure on the instrument panel.
Another option is tie wrapped the Buzzer, onto the Aircraft Wiring Harness, or
attached by tiewrap onto or behind the Instrument Panel, or fasten directly onto the
Remote Switch Unit (See Figure 11.1).
Connect the Buzzer wiring to the Remote Switch Unite via T-Adapter connector. The
rear of the buzzer can be sealed with RTV; however, the front must be left open.
Note:
If the Buzzer for AK-451 is located inside the ELT Main Unit, it is powered by
the ELT Main batteries. The ELT Main Batteries will continue to supply power to the
Buzzer for 78 hours at -20 deg C, at end of 5 years battery life.
Connect Harness:
With the harness installed (See Fig. 14) into the Remote Switch Unit. Install the ELT
in its mounting tray, securing with the Clamp holder. Connect the buzzer wires.
Note:
Splicing may be necessary on the buzzer wire, If more than 4’ long. Connector
is to be sealed with RTV after system has been tested.
Once all tests have satisfactorily been completed and all harness connections have
been verified to be correct, the connectors at the remote cockpit switch and the ELT
should be sealed to prevent moisture from getting into the wire entry holes.
Seal using an electronics grade ('neutral cure'), non-slumping RTV such as GE
Silicones RTV162, Dow Corning 748RTV or Silastic 1080RTV.
Helicopter Installations:
Refer to aircraft manufacturer's data (Type Approval or STC information) and/or
national regulations regarding installation on helicopters. The ELT may be installed
in a helicopter with the ELT unit mounted with “Direction of Flight” arrow pointing
downward at a 10
O
angle to the horizontal plane rather than parallel to it.
Summary of Contents for AK-451 Series
Page 23: ...23 Figure A Front view of ELT Figure B 3 D view of ELT ...
Page 32: ...32 Figure 3 Mounting Tray with Clamp Holder for ELT AF AP ...
Page 37: ...37 Figure 6 Whip Antenna Model AK 451 017 1B ...
Page 39: ...39 Figure 2 1 2 ELT with mounting tray holder and adapter tray ...
Page 42: ...42 Figure 7 1 Rod Antenna AK 451 017 2A 1 ...
Page 45: ...45 Figure 8 Blade Antenna AK 451 017 3A ...
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Page 51: ...51 Figure 11 Remote Audio Buzzer Monitor P N 451018 ...
Page 79: ...79 Figure 18 ELT Front Panels Main Unit and Remote Unit ...
Page 84: ...84 ELT S Top Label Figure 19 Automatic Portable ELT AP with integral antenna Survival ELT S ...
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Page 138: ...138 Table 1 List of all available Protocols ELT Non Location Protocols ...
Page 139: ...139 ELT Location Protocols User Location Protocols ...
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Page 223: ...223 Japan Civil Aviation Board Approval ...
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Page 230: ...230 APPENDIX K MATERIAL SAFETY DATA SHEET FOR BATTERY ...
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