Belfort AWOS, Maintenance Manual

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BELFORT
INSTRUMENT
Proprietary Information
If the VHF Unicom Radio is found to not be operating within the tolerances and you have called
Belfort Instrument Company for support, then
Follow the Belfort AWOS System Component
Failure Instructions in Section 5.10.
T
he following directions are provided if the radio is being replaced.
Directions to replace the Belfort AWOS VHF radio
1. Turn off radio
2. Unplug A/C power cable from back of radio
3. Remove antenna from back of radio. If an RF Attenuator is attached remove it also.
4. Disconnect the Mic Click Adapter RS-232 DB9 from the radio
5. Remove the radio and replace it with the working radio
6. Connect the Mic Click Adapter RS-232 DB9 to the radio
7. Screw the antenna into the antenna jack in the back of the radio. Install RF attenuator
if previously installed
8. Plug in the A/C power cable
9. Turn on radio
New Radio Test
1. If Mic Clicks then test w/ a second radio
2. If Endless Loop then tune second radio and listen to broadcast.
5.10 Belfort AWOS System Component Failure Instructions:
If a Belfort AWOS system component fails a maintenance test, stops operating, or is suspect
to be not operating correctly, perform the following notification steps:
1)
Notify the proper airport authority of the Belfort AWOS system component failure.
Follow the airport authority instructions for dealing with the AWOS component failure.
2) At the DATU display terminal if operational, issue a NOTAM advisory, to alert users that
the Belfort AWOS system is being serviced, or that an instrument is not operational.
Instructions for issuing and deleting NOTAMs are provided in the
"Belfort AWOS
Operator Manual" . Follow FAA requirements for the proper wording of the NOTAM.
Verify that the entered NOTAM advisory is displayed on the Advisor operator screen.
3) After posting the NOTAM, and if the failure is an individual instrument component other
than a barometric pressure sensor, and the balance of the system is still operating, the
operator should at the tower, toggle the “ALERT MESSAGE” toggle switch (located on
the lower half of the hinged tower section (refer to figure 2.a)) the appropriate number of
clicks as designated by the Alert number in the list, to set the Alert condition to be reported.
(See Table below).