CRJ200 Airline Pilot

The personal experiences, thoughts of an CRJ captain


CRJ200 – Display Reversionary Panel (DRP)

Posted by Jeffrey on September 4, 2008

Display Reversionary Panel
Display Reversionary Panel


The display reversionary selector switches on the pilot and copilot display reversionary panels (DRP) are used to present a Primary Function Display (PFD) or EICAS information on the associated Multi-Function Display (MFD).

The displays are screens that can fail. If a PFD display fails, you need a way of moving that information to another display because the PFD is what you need to fly the airplane, which means, you really can’t do without it. The PFD contains essential information like attitude, airspeed, altitude, vertical speed, radar altitude, etc. If that “screen” fails or malfunctions, you need to put the data onto another screen. The logical choice is the MFD.

Looking at the panel above you have three choices: NORM, PFD1, and EICAS.

NORM – You can see in the picture that selector switch is currently positioned on the NORM position. That means that the Multi-Function Display (MFD) is showing the information you selected such as FMS text data, weather radar, TCAS, navigation, EGPWS terrain or maintenance diagnosis computer information.

PFD1 – If you move the selector from NORM to PFD1 (of PFD2, if you are the co-pilot), you are effectively moving the information normally displayed on the PFD display to the MFD display. The MFD information is thus not being displayed but is still available if you need it.

EICAS – If you move the selector from NORM to EICAS, you are doing so because most likely the EICAS Display 1 (ED1) has failed or malfunctioned and you want to displaying the information on the MFD. Though not as important, per se, as the information on the PFD, the EICAS information is definitely important because you need the information about your engines, the Warning and Cautions messages, fuel quantity, etc.

One of the nice things about this selector knob is that you can change displays as necessary. I think one of the important things to remember as well is that the information is still there. The computers are still computing, it’s just that the displays have failed. Remember to review the QRH though if the display does fail, but until then experiment with the knob and see what results you get. Also, don’t forget, if worse comes to worse, you always have your co-pilots displays.

Till next time…



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