Northern Airborne Technology RS08 - Manual (Page 34)

RS08 Remote Switch Manual SM15 Rev. 4.00
Page 3-2 Nov 24, 2003
ENG-FORM: 809-0106.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
3.5.2 Failure Presentations
If there is an internal failure in the RS08 which causes loss of power to the relays, driver
or logic failure, it will appear as one of three presentations:
The annunciator stays lit in one mode or the other, and will not transfer.
The data will likely be correct, and can easily be confirmed by pilot test of the indicated
navigation system. Only one nav source will be available until the system is repaired.
This can also be caused by external switch failure.
No annunciator will light. Lamps test OK.
Indicates relay failure. Do not use any navigation data, as data is likely faulty. Repair
immediately.
Unit will transfer, but only one annunciator will light. Lamps test OK.
Indicates relay or wiring failure, and will probably give valid data only if the lamp lights in
the VOR/ILS mode. Confirm data by pilot test, and repair immediately.
In general, the pilot should always confirm that the presentation he sees is, in fact, tied
to the system he has selected. A simple radial offset or other method will greatly
improve operational safety, and insure that a power failure, ILS channeled nav or other
fault has not presented false navigation data on the HSI/CDI.
End of section 3.0