SM41 Rev. 4.00 NPX138 Panel Mount Radio ManualNov 10, 2003 Page iiENG-FORM: 820-0109.DOTCONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD .IMPORTANT INFORMATIONFOR AVIONICS INSTALLATION FACILITIESThe NPX138 is supplied without TSO certification, as no such standardpresently exists for airborne VHF/FM radio transceivers. Thisequipment provides what is considered as “supplemental”communications, and can be installed in an aircraft on a “Noninterference” basis. Installation should be performed using standardprocedures applicable to aircraft radio installation, to ensure that thenewly installed equipment does not interfere with any other equipmentin the aircraft.This device complies with Part 15 of the FCC Rules. Operation issubject to the condition that this device does not cause harmfulinterference.