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MF20-514 – Zodiac Aerospace Crew Oxygen Mask and Regulator
Available now on the Airparts.aero Marketplace.
The Zodiac Aerospace (now Safran) MF20-514 is a flight-critical, high-performance crew oxygen mask and integrated regulator system designed for professional flight decks. This "full-face" or "quick-donning" assembly is a primary life-support component, providing flight crews with immediate respiratory protection during cabin depressurization, smoke in the cockpit, or the presence of toxic fumes. The MF20-514 is engineered for rapid deployment, allowing a pilot to don the mask and establish an oxygen-rich environment within five seconds using a single hand, a requirement necessitated by high-altitude physiological safety standards.
At the heart of the MF20-514 is an advanced, demand-type regulator that automatically manages the delivery of oxygen based on cabin altitude. The system offers multiple operating modes, including "Normal" (diluter-demand), "100%" (pure oxygen demand), and "Emergency" (positive pressure), the latter of which is essential for purging smoke from the mask interior and preventing the inhalation of contaminants. Constructed from high-grade, biocompatible silicone and impact-resistant polymers, the mask is designed for comfort during extended use while maintaining a fail-safe seal against the wearer's face. For operators of turbine aircraft, the MF20-514 represents the industry standard in safety, reliability, and ergonomic excellence.
Key Features
Quick-Donning Inflatable Harness: Utilizes a pneumatic harness system that inflates for easy placement over the head and headgear, then deflates to provide a secure, customized fit once the donning trigger is released.
Integrated Demand Regulator: Features a high-sensitivity regulator that provides oxygen on demand, conserving the aircraft's oxygen supply while ensuring the pilot receives the required partial pressure of O_2.
Positive Pressure Capability: Includes an emergency setting that maintains a slight positive pressure within the mask to prevent the ingress of smoke or toxic gases.
Communication Integration: Equipped with a high-fidelity internal microphone designed to interface seamlessly with the aircraft’s audio control panel (ACP) and interphone system.
Wide-Vision Lens: Features a high-optical-quality, anti-fogging lens that provides an unobstructed field of view, critical for maintaining situational awareness and instrument scanning during emergencies.
Technical Specifications
Part Number: MF20-514
Component Type: Crew Oxygen Mask & Regulator Assembly
Manufacturer: Zodiac Aerospace / Safran Aerosystems
Operating Modes: Normal (Diluter Demand), 100%, and Emergency (Positive Pressure)
Maximum Operating Altitude: Certified for use up to 45,000 feet MSL
Material: Biocompatible Silicone (Face Seal), Polycarbonate (Lens), Kevlar/Nylon (Harness)
Microphone Type: Noise-canceling, carbon or electret (dependent on specific sub-variant)
Governing Specifications: TSO-C78, TSO-C89, RTCA DO-160
Certification: FAA-PMA / EASA / OEM Original Equipment
Aircraft Compatibility
Airbus A320 Family (A318, A319, A320, A321)
Airbus A330 / A340 Series
Boeing 737 Next Generation (737-600/700/800/900)
Embraer E-Jets (E170/175/190/195)
Note: Mask compatibility is often tied to the specific stowage box and oxygen system plumbing installed on the flight deck. Always cross-reference the Illustrated Parts Catalog (IPC) for your specific tail number.
Applications
Emergency Descent: Provides life-sustaining oxygen during rapid decompression events.
Smoke/Fume Protection: Isolates the pilot's respiratory system and eyes from cockpit contaminants.
High-Altitude Operations: Mandatory standby equipment for flight crews operating above FL250.
Why Choose MF20-514?
The Zodiac MF20-514 is the result of decades of aerospace life-support engineering. Unlike aftermarket or "universal" masks, the MF20-514 is specifically calibrated to the flow rates and pressure profiles of commercial and corporate oxygen systems. Its failure-proof regulator logic ensures that the transition from ambient air to pure oxygen is instantaneous and transparent to the pilot. By maintaining OEM standards with the MF20-514, operators ensure that their crews are protected by equipment that has undergone the most rigorous environmental and physiological testing required by global aviation authorities.
The MF20-514 functions on the principle of Diluter-Demand regulation and Pneumatic Harness Actuation. The regulator utilizes a sensitive Diaphragm-Logic system that detects the user’s inhalation (negative pressure) to open the oxygen demand valve. At lower altitudes, the regulator uses an Aneroid-Controlled Venturi to mix ambient cockpit air with oxygen (Diluter-Demand), but as cabin altitude increases, the aneroid expands to progressively close the air port, ensuring 100% oxygen delivery at critical altitudes.
The harness employs Boyle's Law for its quick-donning feature; when the triggers are depressed, high-pressure oxygen from the supply line inflates the elastomer tubes of the harness, increasing their volume and extending them away from the head. Upon release, the gas is vented, and the elastic memory of the Kevlar-reinforced tubing causes it to contract firmly against the pilot's cranium. Furthermore, the lens is treated with a hydrophilic coating to manage the Phase Change of water vapor (fogging) that occurs during the rapid temperature drops associated with decompression, ensuring the pilot maintains visual contact with flight instruments.
Note: The MF20-514 is a life-limited, flight-critical safety component. It requires periodic functional testing and sanitization in accordance with the Zodiac/Safran Component Maintenance Manual (CMM). The oxygen cylinders and masks must be free of hydrocarbons (oil/grease) to prevent spontaneous combustion. Installation and "first-breath" testing must be performed by a certified mechanic or specialized survival equipment shop.
