Applicability: Aircraft with serial numbers NAV-4-2 to NAV-4-1110
Supersedes: n/a
Compliance: Not later than April 1, 1948
Procedure: 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.
AD-48-08-03