MF20-534 - Safran Aerosystems Full Face Quick Donning Mask

MF20-534 – Safran Aerosystems EROS® Full Face Quick Donning Mask

Available now on the Airparts.aero Marketplace.

Overview

The Safran Aerosystems MF20-534 is a flight-critical, full-face quick-donning oxygen mask and regulator assembly from the renowned EROS® (Emergency Respiratory Oxygen System) product line. This equipment is a cornerstone of flight crew life support, designed to provide immediate respiratory protection from the effects of hypoxia following a depressurization event, as well as from smoke, fumes, or other hazardous contaminants in the cockpit environment. Engineered for rapid, single-handed deployment in under five seconds, the MF20-534 allows flight crews to maintain control of the aircraft without delay during an emergency.

The integrated design combines a full-face mask, providing ocular protection, with a sophisticated demand-type oxygen regulator. This regulator intelligently supplies oxygen based on the user's respiratory needs and altitude, ensuring optimal oxygen concentration and conservation. The mask's advanced inflatable harness and silicone face seal are designed for a superior fit over a wide range of facial profiles, even accommodating corrective lenses, to prevent inward leakage. As a life-saving device mandated by aviation authorities worldwide, the MF20-534 represents the pinnacle of reliability, ergonomic design, and performance in crew protective breathing equipment.

Key Features

• Rapid Donning Capability: Can be donned with one hand in under 5 seconds, a critical safety requirement for emergency situations.

• Integrated Full-Face Protection: A single-piece design protects the eyes, nose, and mouth from smoke, fumes, and irritants while providing oxygen.

• Inflatable Harness: A pneumatic harness inflates upon removal from the stowage box, creating a custom, secure fit and an effective seal.

• Demand-Type Regulator: Automatically provides a selectable N/100% (Normal/100%) oxygen-to-air mixture or 100% oxygen on demand, with an emergency pressure setting.

• Integrated Microphone: Ensures clear and uninterrupted communication with air traffic control and the flight crew during an emergency.

• Superior Visibility: A wide, anti-fog and anti-scratch polycarbonate visor offers an unobstructed field of view of the flight instruments.

Technical Specifications

• Part Number: MF20-534

• Component Type: Full Face Quick Donning Oxygen Mask & Regulator Assembly

• OEM Manufacturer: Safran Aerosystems (formerly Zodiac Aerospace/Avox Systems)

• Series: EROS® MF20

• Material: High-grade silicone (facepiece), impact-resistant polycarbonate (visor), flame-resistant plastics and composites (housing).

• Finish: Standard aviation cockpit colors.

• Governing Specifications: Certified to FAA TSO-C78a (Demand Oxygen Masks) and TSO-C89a (Crewmember Oxygen Masks).

• Microphone Type: Integrated electret microphone, compatible with standard aircraft communication systems.

• Oxygen Supply: Diluter-demand and pressure-demand regulator functions.

Aircraft Compatibility

• Airbus: A320 Family (A319, A320, A321), A330, A340

• Boeing: Commonly used on a wide range of Boeing transport category aircraft.

• Other Transport Category Aircraft: Found on numerous other large and mid-size transport aircraft.

Note: This list is for reference only. The aircraft's specific Illustrated Parts Catalog (IPC) and Component Maintenance Manual (CMM) are the final authorities for determining part applicability.

Applications

• Emergency Life Support: Primary use during in-flight emergencies such as rapid or explosive decompression (hypoxia protection).

• Smoke/Fume Protection: Provides breathable air and eye protection for the flight crew in the event of a cockpit or cabin fire, or the presence of noxious fumes.

• First Aid Oxygen Administration: Can be used for administering therapeutic oxygen if required.

Why Choose MF20-534?

The Safran MF20-534 is a proven, TSO-certified life-saving device trusted by major airlines and aircraft manufacturers globally. Its intuitive, rapid-donning design minimizes the critical time between the onset of an emergency and the crew's ability to respond effectively. Opting for a certified, OEM component eliminates the significant risks associated with unapproved or improperly overhauled parts, ensuring that the mask will perform flawlessly when it is needed most. For flight safety and regulatory compliance, there is no substitute for the quality and reliability engineered into every Safran EROS® mask.

The operational principle of the MF20-534's quick-donning and sealing capability is rooted in fluid dynamics and ergonomic design. Upon removing the mask from its stowage box, the user depresses two red tabs which activates a pneumatic circuit. This circuit channels a small amount of pressurized oxygen to inflate the harness assembly, transforming it from a flat-packed state into a semi-rigid head cradle. This pre-formed shape is crucial for allowing the pilot to sweep the mask onto their face with a single motion, without fumbling with straps. Once positioned, the release of the tabs allows the harness to deflate, contracting to provide a firm and consistent pressure that draws the silicone facepiece against the skin. This action, combined with the material properties of the dual-ridge silicone seal, creates a secure perimeter that can maintain a positive-pressure differential and prevent the ingress of hypoxic or contaminated ambient air, satisfying the stringent anti-leakage requirements of TSO-C89a.

Note: The MF20-534 is a critical life support appliance. It requires periodic inspection, functional testing, and overhaul by a certified repair station in accordance with the Component Maintenance Manual (CMM). Installation must be performed by a certified mechanic. Improper maintenance or installation can result in equipment failure during an emergency.