Beech 1900 D system ?

[chperplt]

Anyone know what the Transponder normal/override switch is actually for?

 

[vja217]

2nd xpndr

Doesn't that toggle between your primary and secondary transponders?

 

[chperplt]

No, it doesn't do that... There is a switch on the transponder itself that toggles between #1 and #2.

 

[Jack Hass]

believe it toggles the transponder between the captains and Fo's altimeter

 

[chperplt]

Nope.. There is a toggle switch right next to the normal/override switch that does that.

 

[flint4xx]

If you have Tcas, I think you can remove it and then operate the transponder via the over-ride since there are some shared components. It has been awhile so don't quote me.

 

[1800 RVR]

From my understanding, the norm/override switch was for ground ops when they are using surface movement radar. It was to help identify your location. It's been awhile since I've flown the airplane, but I think that is what I remembered. (Then again, maybe the checkairmen were just blowing smoke up my backside...)

 

[fly26]

If my memory serves me correctly, 1800RVR is right.

With the switch in the Normal position, the transponder only emits a signal in flight. In Override, it emits a continuous signal in flight AND on the ground.

 

[chperplt]

Fly26

You are correct. I got an e-mail from a FlightSafety Beech guru and that's exactly what he said. The normal position will put the transponder in standy-by with weight on wheels.