Electrical Wiring Interconnect System

T his zone of the aircraft experiences high vibration, heat, frequent maintenance cycles, and susceptibility to chemical contamination. There are critical variable temperature zones within the engine cowling. Typically, the region around the fan is cooler, with temperatures in the range of 85°– 95°C. Aft of the fan, temperatures increase dramatically. Design coordination with the aircraft manufacturer is required for all EWIS technologies routed in and out of the nacelle and via the pylon. Nacelle and Pylon Immediate adjacency to engine and gear box plus wing and wheel well ZONE 3

Firewall and Pressure Boundary Feed-Thrus „„ High-grade engineering thermoplastic or machined metal „„ Solid and split-shell versions „„ Ideally suited for pressure, vapor, and firewall bulkheads throughout the aircraft including Zone 3 „„ O-ring sealed panel and box mounting interface „„ Conductive and non- conductive finish options

Zone 3 Application Guidelines

Environmental Stress Factors

Applicable RTCA/DO-160 Requirements


DO-160 Category S and H (Table 8-1) DO-160 Category D, Test Procedure 1 -65° to 200°C; DO-160 Category D3 Sea level to 50kft; DO-160 Category D3 -55° to 200°C; DO-160 category D3


Ground Survival Temperature

Pressure Differential Operating Temperature


Exposure to humidity and condensation; DO-160 Category B

Qwik Connect • April 2019


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