7980-1016-002 - Safran Aerosystems Retaining Ring

7980-1016-002 – Safran Aerosystems Retaining Ring

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Overview

The Safran Aerosystems 7980-1016-002 is a precision-engineered, OEM retaining ring used within the regulator assembly of the EROS® series of flight crew quick-donning oxygen masks. This seemingly simple component plays a flight-critical role in the structural integrity and operational reliability of the mask's demand regulator. Specifically, it is designed to securely locate and retain internal components, such as valve seats or diaphragms, ensuring they remain in their precise design position under all operating pressures and environmental conditions, from sea level to high altitude.

Manufactured from corrosion-resistant steel, this retaining ring is engineered to withstand the unique challenges of a pure oxygen environment while maintaining its mechanical properties over a long service life. Its precise dimensions and tensile strength are critical for preventing component shifting or dislodgement, which could otherwise lead to a catastrophic failure of the regulator to deliver oxygen. As an internal component of a life-support system, the use of a fully certified and traceable 7980-1016-002 part is absolutely essential for regulatory compliance and flight crew safety.

Key Features

• OEM Certification: Genuine Safran Aerosystems component, ensuring perfect fit, form, and function.

• Precision Manufacturing: Engineered to exact tolerances for secure seating and retention within the regulator assembly.

• High-Strength Material: Fabricated from aerospace-grade corrosion-resistant steel (CRES) for durability and oxygen compatibility.

• Critical Safety Function: Ensures the internal components of the oxygen regulator remain correctly positioned.

• Fatigue Resistance: Designed to withstand pressure cycling and vibration without loss of clamping force.

Technical Specifications

• Part Number: 7980-1016-002

• Component Type: Internal Retaining Ring

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

• Application: EROS® Quick Donning Mask Regulator Assembly

• Material: Corrosion-Resistant Steel (CRES), likely Type 302 per ASTM A313. Specific material grade must be confirmed by the OEM Certificate of Conformance (CofC).

• Finish: Passivated.

• Dimensions: Specific diameter and thickness are proprietary and controlled by the OEM drawing.

• Governing Specifications: Manufactured as a component of systems certified to FAA TSO-C78a and TSO-C89a.

Aircraft Compatibility

The 7980-1016-002 is a sub-component of Safran EROS® oxygen masks, which are installed on a vast range of aircraft, including but not limited to:

• Airbus: A320 Family, A330, A340, A350, A380

• Boeing: 737, 747, 757, 767, 777, 787

• Bombardier: Global Series, Challenger Series

• Dassault: Falcon Series

• Gulfstream: G-IV, G-V, G550, G650

Note: This part is not a line-replaceable unit (LRU). Its applicability is determined by the specific mask assembly part number. The aircraft's Component Maintenance Manual (CMM) for the mask assembly is the final authority for part verification.

Applications

• Component Retention: Secures critical components within the diluter-demand oxygen regulator of the EROS® mask.

• Structural Integrity: Provides a pre-loaded force to maintain the correct assembly stack-up, preventing internal leaks or mechanism failure.

• Maintenance and Overhaul: Used by certified repair stations during the assembly and overhaul of Safran oxygen mask regulators.

Why Choose 7980-1016-002?

While small, the 7980-1016-002 retaining ring is a non-negotiable component for the safe overhaul of a life-support system. Using a non-OEM or uncertified ring introduces significant risk, including incorrect material composition leading to oxygen-accelerated corrosion, or improper dimensions causing a loss of retention force. A failure of this part could lead to the complete failure of the oxygen mask during a depressurization or smoke emergency. Sourcing a genuine, traceable Safran 7980-1016-002 from an authorized distributor is the only way to guarantee the airworthiness and safety of the repaired mask.

The material selection for the 7980-1016-002, typically an austenitic stainless steel from the 300 series like CRES 302, is driven by critical engineering requirements beyond simple strength. In this application, the material must exhibit excellent work-hardening characteristics and a high modulus of elasticity. During installation into its groove within the regulator body, the ring is elastically deformed. Its ability to spring back with a calculated amount of force is what provides the consistent, pre-loaded axial pressure required to secure the internal component stack. Furthermore, CRES 302, when passivated, forms a chromium-oxide passive film on its surface. This film is crucial for preventing galvanic corrosion when in contact with other metallic components and, most importantly, renders the material highly resistant to oxidation, making it compatible for service in a high-pressure, nearly 100% oxygen environment where less noble materials could pose a combustion risk.

Note: This part is intended for installation by certified repair stations during the overhaul of Safran Aerosystems oxygen masks. It is not an end-user or flight-line replaceable part. All work must be performed in strict accordance with the official Component Maintenance Manual (CMM) for the specific mask assembly.

Documentation

No public-facing OEM documentation or specification sheet are available for this specific component part number. All relevant technical data, installation diagrams, and specifications are contained within the proprietary Safran Aerosystems Component Maintenance Manual (CMM) for the parent mask assembly. Please refer to that resource for any further informaation.