- Bearing Pointer Warning flag:
Notes:
Bearing pointers are used to display station bearing relative to the aircraft heading. There is a source selector switch for each bearing pointer. Pointer #1 can be connected to VHF nav rcvr #1 or the ADF rcvr. Pointer #2 can only be connected to VHF nav rcvr #2. selector switch.
Pointer Flag In-view (Pointer set to VOR):1.Look for the same flag on the opposite RDDMI.If the same flag is in view on the opposite RDDMI (example: both #1 pointer flags) then the nav source is the likely problem. To further verify this, move the VHF Nav XFR sw to a different nav source and watch the flags.
2.If the flag on the opposite RDDMI is not in-view, then the indicator with the flag is the most likely problem.
3.If indicator does not fix the problem then check the wiring between the indicator and the nav source.
Pointer Flag In-view (Pointer set to ADF - #1 Only): ADF Notes:When the #1 pointer is selected to ADF, the flag will indicate the condition of the indicator or whether the ADF is powered. It does not indicate a valid or in-valid ADF signal.
1.With the ADF turned on, Set both RDDMI #1 pointers to ADF.
2.If you have a flag on only one of the RDDMI’s then the indicator is the most likely problem.
3.To verify, set the bearing pointer selector switch back to VOR and see it the flag remains in-view.
4.If the flags on both RDDMI’s are in-view then you may have a problem with the ADF control panel or the wiring from the panel to the indicators.
RDDMI INFORMATION:
Circuit Breakers:ADF #1: P18-1 = B4.
ADF #2 (If Installed): P6-1 = B15.
Compass #1: P18-2 = B4.
Compass #2: P6-1 = B10.
Instrument Transformer 2: P6-1 = A12.
Instrument Transformer 1: P18-2 = A1.
Applicable deferrals 34-17=VHF Navigation Systems(VOR). 34-16=Radio Compass Systems (ADF). 34-42=Radio Magnetic Indicators.