Managing Obsolescence in Aerospace
Obsolescence in aerospace isn’t just an inconvenience; it’s a critical operational and safety challenge. When a material, component, or formulation becomes unavailable or non-compliant, the consequences can include grounded aircraft, costly redesigns, extended lead times, and complex requalification processes.
In high-reliability industries such as aerospace, where product lifecycles can exceed 30+ years, managing material obsolescence requires technical expertise, regulatory awareness, and proactive supplier partnerships.
Table of Contents
Why Do Aerospace Materials Become Obsolete?
How Aerospace Materials Have Evolved
Solutions to Aerospace Obsolescence
The Importance of a Technical Partner
What Information Is Required to Assess Obsolescence?
Why Do Aerospace Materials Become Obsolete?
Aerospace components are designed for long-term durability; however, fast-paced technological innovation and the discontinuation of limited production lines often render specific parts obsolete well before the aircraft or systems they support reach the end of their service life. This obsolescence significantly impacts Maintenance, Repair and Overhaul (MRO) activities and Service Life Extension Programmes (SLEP), costing the industry billions each year.
Material or product obsolescence typically occurs for several key reasons:
Regulatory & Environmental Changes
Evolving regulations can restrict or eliminate certain substances. For example, increasing scrutiny around PFAS materials has affected fluoropolymer supply chains, while European REACH regulations have limited the use of certain additives and chemicals.
Supplier Withdrawal
Raw material producers may discontinue grades due to:
- Low demand
- Raw material scarcity
- Mergers and acquisitions
- Strategic portfolio shifts
Aerospace-specific grades are particularly vulnerable due to relatively small production volumes.
Technology & Performance Evolution
As aircraft designs evolve, from legacy commercial fleets to next-generation platforms like the Airbus A350 or Boeing 787 Dreamliner, performance demands increase:
- Higher operating temperatures
- Reduced weight requirements
- Improved chemical resistance
- Enhanced fire, smoke and toxicity (FST) performance
Older materials may no longer meet modern specifications.
Ageing Platforms
Many military and civil aircraft remain in service for decades. Materials originally specified in the 1980s or 1990s may no longer be available, yet replacement must meet original certification requirements.
How Aerospace Materials Have Evolved
Historically, materials were selected primarily for chemical resistance and thermal stability. Today, selection criteria include:
- Weight optimisation for fuel efficiency
- Low outgassing properties
- Improved FST performance
- Reduced environmental impact
- Compatibility with hydrogen and sustainable aviation fuels (SAF)
Fluoropolymers, high-performance thermoplastics, advanced composites, and engineered sealing systems have all evolved to meet these challenges. Modified PTFE grades, PEEK-based compounds, and advanced filled materials now offer significantly improved mechanical and wear properties compared to legacy materials.
Standards & Compliance Requirements
When addressing obsolescence in aerospace, replacement materials must meet stringent standards. These may include:
- SAE International specifications
- ASTM International material standards
- European Union Aviation Safety Agency (EASA) requirements
- Federal Aviation Administration (FAA) certification
- EN 9100 / AS9100 quality standards
- OEM-specific specifications (Airbus, Boeing, Rolls-Royce, etc.)
Depending on the application, testing may involve:
- Tensile and compressive strength
- Creep and cold flow performance
- Chemical compatibility
- Thermal cycling
- Flame, smoke and toxicity testing
- Outgassing evaluation
Requalification can range from simple equivalency testing to full re-certification.
Solutions to Aerospace Obsolescence
Material Substitution & Equivalency
A technically equivalent or superior grade can be identified through comparative testing and validation. This requires deep knowledge of polymer chemistry, compounding, and processing behaviour.
Reverse Engineering
Where documentation is limited, legacy materials can be analysed for:
- Polymer type
- Filler content
- Mechanical properties
- Processing characteristics
This enables development of a compliant, reproducible alternative.
Reformulation & R&D Development
Custom compounds can be developed to:
- Improve wear resistance
- Reduce cold flow
- Meet updated FST standards
- Remove restricted substances
Stock Management & Strategic Buffering
For programmes with limited future redesign potential, long-term stocking agreements may mitigate supply risk.
Redesign for Performance Upgrade
Obsolescence can present an opportunity to improve performance, lighter-weight components, extended service life, or improved sealing reliability.
The Importance of a Technical Partner
Managing obsolescence is rarely solved by a simple “like-for-like” replacement. It requires collaboration between:
- Engineering
- Procurement
- Quality & compliance teams
- Material scientists
Working with a specialist solution provider reduces risk and shortens lead times.
A capable partner should offer:
- In-house R&D and testing facilities
- Material analysis capability
- Experience with aerospace qualification processes
- Knowledge of regulatory frameworks
- Transparent traceability and certification
What Information Is Required to Assess Obsolescence?
To effectively support a replacement programme, the following information is typically required:
- Original material specification or drawing reference
- Application details (static seal, dynamic seal, bearing, insulator, etc.)
- Operating temperature range
- Media exposure (fuel, hydraulic fluid, aggressive chemicals)
- Pressure and load conditions
- Regulatory requirements (FST, outgassing, etc.)
- Certification level required (prototype, flight-qualified, defence programme, etc.)
- Historical performance issues
The more complete the data set, the lower the technical and certification risk.
Why Work With Fluorocarbon?
At Fluorocarbon, we specialise in high-performance polymer solutions for critical industries including aerospace, semiconductor, oil & gas, hydrogen energy, and advanced manufacturing.
Our Strengths:
Dedicated R&D Team
Our in-house research and development team works on:
- Material reformulation
- PFAS-conscious alternatives
- Performance optimisation
- Application-specific compound development
Advanced Material Expertise
Decades of experience in PTFE, modified fluoropolymers, and high-performance engineered plastics.
Aerospace-Focused Quality Systems
Robust traceability, documentation, and compliance aligned with aerospace requirements.
Collaborative Engineering Approach
We work as an extension of your engineering team, identifying risks early, proposing validated alternatives, and supporting testing and qualification.
Turning Obsolescence Into Opportunity
Obsolescence doesn’t have to mean disruption. With the right technical partner, it can become an opportunity to:
- Improve reliability
- Reduce weight
- Enhance compliance
- Future-proof supply chains
In aerospace, where safety and performance are non-negotiable, proactive material management is essential.
Fluorocarbon’s R&D-led approach ensures that when legacy materials disappear, performance does not. Contact us today to discuss your requirements.