Beechcraft King Air 350 — Supplemental Type Certificate

This document outlines the Supplemental Type Certificate (STC) modifications made by Sierra Nevada Corporation (SNC) for the Beechcraft King Air series, specifically focusing on the King Air 350 model. The modifications include a structural extension of the aircraft's nose to accommodate a retractable electro-optical/infrared (EO/IR) sensor. This STC allows for significant flexibility in mission requirements while maintaining the aircraft's original weight and center of gravity limitations. The document is intended for operators and maintainers of the King Air 350, providing essential information about the modifications and their operational benefits.

• The STC allows for a 3-foot structural modification to the King Air 350.
• The installation accommodates a fully retractable 15-inch EO/IR sensor.
• The sensor can be deployed/retracted in less than 20 seconds.
• The aircraft's weight and center of gravity limitations remain unchanged from the OEM configuration.
• The modification provides a low-visibility profile when the sensor is stowed.