20E85-3 — Bleed Air Valve Repair & Overhaul

Component Overview

A bleed air valve regulates the extraction of high-temperature, high-pressure air from an engine compressor stage for use in pneumatic, anti-ice, pressurization, and air-conditioning systems, functioning within the air-management system's bleed-air capability. It opens, closes, or modulates to control bleed flow and is typically a pneumatically actuated butterfly or poppet valve, sometimes with electrical solenoid control and integral pressure sensing. Operating in a hot, high-cycle environment, it is subject to seat and disc erosion, butterfly-shaft and bushing wear, actuator diaphragm and seal degradation, and spring fatigue. Carbon and contamination buildup, thermal distortion, and corrosion commonly cause sticking, internal leakage, or out-of-tolerance regulation. These conditions drive disassembly, seal and bushing replacement, recalibration, and functional flow and leakage verification.

Aircraft Application

Part number 20E85-3 (Bleed Air Valve) is installed on the Beech 99. QTC supports operators and MROs servicing this platform with certified repair and overhaul.

Our Repair Capability

QTC repairs and overhauls 20E85-3 to the original manufacturer's specifications under our FAA and EASA Part 145 approvals. Our team — including former OEM pneumatic & air management engineers — performs teardown, inspection, cleaning, component replacement, functional testing, and certification, returning a serviceable unit with the appropriate airworthiness release. We also develop repairs for rejected and beyond-economic-repair (BER) hardware.

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Frequently Asked Questions