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119003-21 – Bombardier OEM Protective Breathing Equipment (PBE) Smoke Hood
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The 119003-21 is a life-critical, self-contained Protective Breathing Equipment (PBE) unit, commonly referred to as a "Smoke Hood," specifically engineered for the flight crews of Bombardier Challenger, Global, and CRJ series aircraft. Manufactured by Avox Systems (Safran) 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. The 119003-21 is a "one-size-fits-all" solution that encapsulates the entire head, providing a minimum of 15 minutes of breathable oxygen while protecting the wearer from heat, smoke, and irritants.
Unlike standard flight deck oxygen masks, the 119003-21 is completely independent of the aircraft's fixed oxygen system. It utilizes a chemical oxygen generator that activates automatically when the unit is pulled from its vacuum-sealed storage container. This unit is a mandatory safety item for Part 25 certified turbine aircraft, typically stowed in the flight deck, galleys, and near emergency exits.
Key Features
Closed-Circuit Oxygen System: Delivers a continuous flow of aviator-grade oxygen for 15 minutes, allowing crew members to perform firefighting duties or manage a cabin evacuation.
Pneumatic Neck Seal: Features a flexible, hypoallergenic seal that accommodates different neck sizes and provides a gas-tight barrier, even over glasses or long hair.
Wide-Field Anti-Fog Visor: Provides a clear $270^\circ$ field of vision, constructed from high-visibility, flame-resistant materials to ensure the wearer can navigate through dense smoke.
Integrated Speech Diaphragm: Equipped with a phonic membrane that facilitates clear verbal communication between crew members and over the aircraft's interphone system.
Tamper-Evident Stowage: Housed in a rugged, vacuum-sealed container with a humidity indicator (Blue/Pink) and a visual "serviceable" status window for rapid pre-flight inspections.
Technical Specifications
Part Number: 119003-21
Manufacturer: Avox Systems / Safran (for Bombardier)
Component Type: Crewmember Protective Breathing Equipment (PBE)
Duration: Minimum 15 Minutes
Oxygen Source: Solid-State Chemical Oxygen Generator ($NaClO_3$)
Weight: Approx. 3.2 lbs (1.45 kg) in stowage box
Certification: TSO-C116 / TSO-C116a (Airborne PBE)
Service Life: 10 Years from date of manufacture (Disposable after use or expiration)
Aircraft Compatibility
Bombardier Challenger Series: 300, 350, 604, 605, 650.
Bombardier Global Series: 5000, 6000, 7500.
Bombardier CRJ Series: 200, 700, 900.
Note: The 119003-21 is the primary PBE specified in the Bombardier Illustrated Parts Catalog (IPC) Section 35-30. Always verify mounting bracket compatibility for your specific interior configuration.
Applications
The 119003-21 is utilized for Emergency Firefighting and Smoke Penetration. Its primary roles include:
On-Board Firefighting: Protecting the crew from toxic byproducts of combustion (Carbon Monoxide, Hydrogen Cyanide) while locating and extinguishing fires.
Smoke-Filled Cabin Management: Enabling flight attendants to maintain visibility and provide commands during cabin emergencies.
Toxic Fume Protection: Defense against "Fume Events" or hydraulic fluid leaks entering the Environmental Control System (ECS).
Why Choose 119003-21?
Choosing the genuine Bombardier/Avox 119003-21 ensures total Regulatory Compliance with FAA and EASA safety mandates. This unit is specifically tested for Carbon Dioxide ($CO_2$) Scrubbing efficiency; inferior or expired hoods can lead to $CO_2$ poisoning within minutes of donning. The 119003-21 is engineered with a specific internal volume that prevents the "suffocation" sensation often associated with non-aviation emergency hoods, allowing the crew member to remain calm and effective in a crisis.
The 119003-21 operates as a Closed-Loop Respiratory Circuit. When the activation ring is pulled, a chemical core generates oxygen ($O_2$) through an exothermic reaction. The physics of the unit involves a Positive Pressure Gradient; by maintaining an internal pressure ($P_{int}$) higher than the surrounding smoky atmosphere ($P_{amb}$), it physically prevents contaminants from entering the neck seal. Furthermore, the unit contains a Lithium Hydroxide ($LiOH$) Scrubber, which removes $CO_2$ from the exhaled breath. This ensures that the wearer does not suffer from hypercapnia during the 15-minute duration, even under the high respiratory rates associated with the stress of firefighting.
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. Pre-flight inspections must verify that the vacuum seal is intact and the humidity indicator is "Blue." If the indicator is "Pink" or the seal is broken, the unit is unserviceable. This unit is for one-time use only.
