N8256E Manuals


The airplane is equipped with a PM501 4 place intercom from PS Engineering. Headphone and mic jacks are adjacent to each seat position. Although simple, the intercom has a number of features described in its Pilot Guide.


The dual Nav/Comm units are Collins Microline units. Unlike most of the King line, each function is a separate unit. The Comm radios are on the left and the Nav receivers are on the right. Each is independently powered. the 2 Comm radios are identical and can be swapped with each other, as can the two Nav units.

Nav/Comm face

The Comm radios are VHF-251, and the Nav radiosare VIR-351.

Comm Radios

There are 2 sets of concentric knobs.

On the left, the inner knob is a Power/Vol control. Full anti-clockwise turns the unit off. If this knob is pulled out, the squelch is defeated, allowing marginal reception or for the volume to be set. The outer knob is a 3 position switch. It should normally be in the Select position. If turned anti-clockwise to the Store momentary position, the currently selected frequency is stored in memory (until power is lost). Switching this knob clockwise from the Select to the Recall position will change from the selected frequency to a previously stored one. Note that the right knobs still alter the selected frequency, not the recalled one.

The 2 right hand knobs alter the selected frequency in MHz (outer) and kHz (inner). The range is from 108.00 to 135.975 MHz in 25 kHz steps. The knobs roll over at the limits.

The unit is auto-dimming, so that the display is brighter in the daylight.

There is an indicator XMIT at the top right. It shows when the unit is transmitting. Its intensity is a measure of the strength of the voice component of the transmission.

Nav Radios

The layout is similar to that of the Comm radio.The inner left knob is the Power/Vol control. Pulling it out filters the audio to select for the Morse ID of a VOR. The outer knob is a 3 position switch. In its center position the display shows the frequency selected. Switched to the left the display shows the radial TO the VOR. Switched to the right it shows the radial FROM the VOR. These numbers should correlate with the appropriate OMNI indicator. Note that for a VOR check, the OMNI readings should be used, not these.

The right hand knobs select the Nav frequency in a manner similar to the Comm unit. Note that the smallest frequency increment is 500 kHz.


The DME unit is a King KN64.

DME face

This unit is normally kept under remote control by the Nav receivers. The switch to select control by Nav1 or Nav2 is to the top left of the avionics stack.

The white slider switch on the DME face can be used to switch to local (independent) control by sliding it to either the central or right positions. The DME channel is then selected by the 2 concentric knobs to the right.

The lower black slider switch is the power switch for the DME.

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