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MR-10037N – Bombardier OEM Protective Breathing Equipment (PBE) Smoke Hood
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The MR-10037N is a life-critical, self-contained Protective Breathing Equipment (PBE) unit, commonly known as a "Smoke Hood," engineered for the flight crews and cabin attendants of Bombardier Challenger, Global, and CRJ series aircraft. Manufactured by B/E Aerospace (now Collins Aerospace) as an Original Equipment Manufacturer (OEM) component, this unit provides high-fidelity respiratory and ocular protection during in-flight fires, smoke-filled cabins, or toxic fume emissions. Unlike standard oxygen masks, the MR-10037N is a completely independent system that fits over the entire head, providing up to 15 minutes of breathable oxygen and protecting the wearer from stinging smoke and thermal hazards.
The MR-10037N utilizes a "Solid-State" oxygen generator or a compressed oxygen cylinder (depending on the specific "10037" series revision) that activates automatically when the hood is donned and the actuation ring is pulled. Its vacuum-sealed, tamper-evident packaging ensures the unit remains pristine and chemically stable for its entire 10-year service life, making it a mandatory safety item for Part 25 certified turbine aircraft.
Key Features
Universal "One-Size" Design: Features a flexible, flame-resistant neck seal that fits securely over glasses, long hair, and various head sizes, ensuring a gas-tight barrier in less than 15 seconds.
15-Minute Life Support: Delivers a continuous flow of aviator-grade oxygen, sufficient for a crew member to locate a fire source, operate a fire extinguisher, or manage a cabin evacuation.
Wide-Angle Anti-Fog Visor: Provides an unobstructed $270^\circ$ field of vision, constructed from high-visibility, heat-reflective materials to ensure the wearer can navigate a dark or smoke-obscured cabin.
Integrated Phonic Membrane: Features a specialized speech diaphragm that allows for clear verbal communication between crew members and over the aircraft's interphone system while the hood is active.
Vacuum-Sealed Storage: Housed in a rugged, low-profile container or soft pouch designed for bulkhead mounting, featuring a humidity indicator to verify the internal seal integrity.
Technical Specifications
Part Number: MR-10037N (10037 Series)
Manufacturer: B/E Aerospace / Collins Aerospace (for Bombardier)
Component Type: Protective Breathing Equipment (PBE) / Smoke Hood
Duration: Minimum 15 Minutes
Oxygen Source: Solid-State Chemical Oxygen Generator
Material: Flame-retardant Kapton/Teflon-based hood with Silicone neck seal
Weight: Approx. 3.5 lbs (1.6 kg) in stowage container
Certification: TSO-C116 (Airborne Protective Breathing Equipment)
Service Life: 10 Years (Disposable after use or expiration)
Aircraft Compatibility
Bombardier Challenger Series: 300, 350, 604, 605, 650.
Bombardier Global Series: 5000, 6000, 7500 (Express).
Bombardier CRJ Series: 200, 700, 900, 1000.
Note: The MR-10037N is the standard line-fit PBE for most Bombardier regional and business jets. Always verify the specific mounting bracket or "stowage box" part number in the Aircraft Illustrated Parts Catalog (IPC) Section 35-30.
Applications
The MR-10037N is utilized for Emergency Firefighting and Smoke Penetration. Its primary roles include:
In-Flight Firefighting: Allowing crew members to approach the source of a fire (e.g., in a galley or lavatory) without inhaling toxic combustion byproducts.
Emergency Cabin Management: Enabling flight attendants to provide instructions and manage passenger safety in a smoke-filled environment.
Toxic Fume Protection: Protecting the crew during "Fume Events" or hydraulic fluid leaks that enter the environmental control system (ECS).
Why Choose MR-10037N?
Choosing the genuine Bombardier/Collins MR-10037N is essential for Regulatory Compliance. TSO-C116 units are rigorously tested for Carbon Dioxide ($CO_2$) Scrubbing efficiency; non-certified or expired hoods can lead to $CO_2$ buildup, causing dizziness or unconsciousness within minutes. The MR-10037N's neck seal is specifically engineered to maintain its elasticity without causing "pressure-choke" on the wearer, a common failure point in lower-quality emergency hoods.
The MR-10037N functions as a Closed-Circuit Rebreather governed by the principles of Chemical Oxygen Generation. When the unit is activated, a sodium chlorate ($NaClO_3$) core undergoes a controlled exothermic reaction, releasing pure $O_2$. The physics of the hood involve a Positive Pressure Environment; the constant flow of oxygen keeps the internal pressure ($P_{internal}$) slightly higher than the outside atmospheric pressure ($P_{ambient}$), physically preventing smoke particles from entering the neck seal. Additionally, the hood contains a Lithium Hydroxide ($LiOH$) Scrubber, which chemically removes the exhaled $CO_2$ from the internal atmosphere, allowing the wearer to breathe the same volume of air repeatedly without the risk of hypercapnia.
Note: This is a safety-critical, time-limited component. This unit contains a chemical oxygen generator and is classified as Hazmat Class 5.2 (Oxidizer) for shipping purposes. Prior to flight, the pre-flight inspection must verify that the "Tamper-Evident" seal is intact and the humidity indicator is "Blue" (not "Pink"). If the vacuum seal is compromised, the unit must be replaced immediately. This unit is for one-time use only and must be discarded after activation.
