HR Smith Techtest 503 Series, Руководство по обслуживанию

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Commercial In Confidence
Issue 17 - 11.04.18 - CN 10407
HRS1013-04-02
7
2.5 Interface Unit 503-15 Series (Figure 10)
The Interface Unit is designed to pass GPS data to the ELT such that the 406.025 MHz
transmission can pass positional data to the satellite. The Interface Unit can be JAA
(ED62) compatible or FAA (RTC/DO-204) compatible in order to provide the required
interface. The change is a link in the interface connector and is not switchable by the
operator.
2.6 Water Activated Switch 503-23-1 (Figure 11)
The Water Activated Switch provides the ELT system with automatic activation upon
immersion in salt or fresh water.
2.7 Antenna (Figures 12 - 19)
External to the aircraft a three frequency antenna transmits the signal. The antenna
can be anyone of the antenna types shown in Figures 12 to 18. The antenna shown
in Figure 19 is used when the ELT is operated in the portable mode. This antenna is
stowed ready for use on the mounting tray.
3. ELT INHIBIT FACILITY
Note: This section applies only to the G-Switch variants incorporating an inhibit
facility.
These variants are:
503-7-3, 503-7-3INH, 503-7-4, 503-7-12INH, 503-7-14,
503-19-1, 503-19-2, 503-19-2A, 503-19-4,
503-19-5, 503-19-7, 503-19-8, 503-19-10, 503-19-11, 503-19-12,
503-35, 503-35-1, 503-35A, 503-35AA, 503-35-AM & 503-35A-AM
For all other G-Switch variants, Pins 10, 11 & 12 on the G-Switch should not be
connected.
The ON position of the ARM/OFF/ON switch on the G-Switch over-rides all the other
inputs:
It by-passes all other inputs including ‘INHIBIT’. •
It does not carry out a BIT. •
It does not wait for GPS and therefore does not encode a GPS position. •
It activates the ELT immediately. •
It is effectively an ‘OVERRIDE’ switch.
In normal operation it is not envisaged that this switch would be used. The ON switch on
the remote control panel would be used instead (As part of ED62, the ARM/OFF/ON switch
should not be accessible from the pilot’s seated position)
3.1 Inhibit Facility
The Inhibit Facility (where incorporated) allows the installation of a separate switch
to disable (inhibit) the operation of the G-Switch. When inhibited, the ELT cannot be
activated due to ‘G’ levels or by selecting ‘ON’ at the Remote Controller. The self test
function is also disabled. The system can, however, be activated by the ARM/OFF/
ON switch on the G-Switch.