GPS 155XL/GNC 300XL Installation Manual Page 1-1
190-00067-22 Revision F
1 GENERAL DESCRIPTION
1.1 Introduction
This manual describes the physical, mechanical, and electrical characteristics and the installation
requirements for the GPS 155XL/GNC 300XL Aviation Kit. After installation of the GPS 155XL/GNC
300XL system, FAA Form 337 must be completed by an appropriately certified agency to return the
aircraft to service.
1.2 Technical Characteristics
The conditions and tests required for TSO C129a approval of the GPS 155XL/GNC 300XL are minimum
performance standards. It is the responsibility of the agency installing this system either on or within a
specific type or class of aircraft to determine that the aircraft installation conditions are within the TSO
standards. The system may be installed only if evaluation by the applicant documents an acceptable
installation and is approved by the administrator. For TSO/JTSO Compliance, see Appendix A.
1.2.1 Physical Characteristics
1.2.2 Operational Characteristics
Characteristic Specification
Operating Temperature Range
-20°C to +55°C
Humidity 95% non-condensing
Altitude Range -1,500 to 50,000 ft.
Power Range (GNC 300XL) 10 to 15.1 VDC
Power Range (GPS 155XL) 10 to 33 VDC
Power Requirements (GNC 300XL) 1.35A @ 13.8V (not transmitting); 5.5A @
13.8V (transmitting)
Power Requirements (GPS 155XL) 0.95A @ 13.8V
Characteristic Specification
Width 6.25 inches
Height 2 inches
Depth 5.65 inches
GPS 155XL Weight (Unit Only) 2.05 lbs.
GNC 300XL Weight (Unit Only) 2.55 lbs.
GA 56 Antenna Weight 0.25 lbs.
Aviation Rack Weight (w/connector) 0.83 lbs.
Max Air Speed(Structural rating for antenna) Subsonic
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