48-08-03 NAVION: Applies to Serial Numbers NAV-4-2 Through NAV-4-1110.
To be accomplished as soon as possible but not later than April 1, 1948.
To insure full opening of the fuel shutoff valve when the control knob is pushed to the full "ON" position, conduct the following inspection:
Determine that the fuel shutoff valve flexible control is adequately supported along its length from the instrument panel to the shutoff valve to prevent buckling of the flexible control when it is moved to the "ON" position while valve motion is restrained by the fingers to simulate moderate valve friction. One additional support clip must be added adjacent to the present support clip at the valve end of the flexible control to prevent rotation of the present clip and resultant misalinement of the flexible control if the clip attaching screw should become loose. Other additional support clips along the flexible control may be necessary. Also determine that the control is properly rigged with respect to valve detents and that excess wire has been cut from the valve end of the control wire to prevent snagging of the end of the wire in the upholstery.