Beechcraft King Air C90GTx — Parts Catalog

This Instructions for Continued Airworthiness (ICA) manual provides essential information for the Beechcraft King Air 90 series airplanes modified with CenTex Aerospace’s Saddle Tank STC. It details the installation and maintenance of auxiliary fuel tanks, known as saddle tanks, which are mounted on the wings behind each engine nacelle. The manual outlines the necessary procedures for ensuring the continued airworthiness of the aircraft, including maintenance checks, servicing, and troubleshooting of the auxiliary fuel system. It serves as a critical resource for maintenance personnel and operators to ensure compliance with FAA regulations and safe operation of the modified aircraft.

• The auxiliary saddle tanks have a capacity of 90 gallons each, installed behind each engine nacelle.
• Fuel drain hoses must be replaced every 10 years as part of maintenance.
• The saddle tanks should be filled last, ensuring wing and nacelle tanks are full beforehand.
• The fuel system allows for gravity feeding from the saddle tanks to the center fuel tank.
• Optical fuel level sensors indicate fuel levels with LED lights, changing from green to amber as levels drop.