This article is based on an official press release from Monash University and RMIT.

Moisture Absorption Identified as Primary Driver of Carbon Fibre Degradation in Aircraft

Modern commercial aviation has increasingly turned to carbon fibre reinforced polymers (CFRP) to build lighter, more fuel-efficient Commercial-Aircraft. While these advanced composites are celebrated for their immense strength and resistance to traditional rust, they possess a hidden vulnerability: the slow absorption of environmental moisture during service. According to a recent press release detailing joint research from Monash University and RMIT University, engineers have definitively identified moisture absorption as the most critical factor in how these aerospace materials degrade over time.

The study, published in February 2026 in the journal Composites Part A: Applied Science and Manufacturing, resolves a long-standing debate within the aerospace engineering community. Historically, industry experts have questioned whether high temperatures cause unique types of structural damage to composite materials, or if heat simply accelerates the natural aging process. The new findings confirm that the total volume of moisture absorbed by the material dictates its degradation, overriding the specific temperature or humidity levels present during exposure.

The Mechanics of Hygrothermal Aging

Carbon fibre reinforced polymers are favored in modern Manufacturing because they replace heavier traditional metals like aluminum, offering exceptional durability without the risk of conventional corrosion. However, as noted in the research report, these materials are susceptible to “hygrothermal aging”, a process where prolonged exposure to heat and environmental moisture causes the material to slowly weaken from the inside out.

Microscopic Damage and Fibre Orientation

Utilizing advanced imaging techniques, the research team observed the exact nature of this internal degradation. As the composite materials aged, they developed tiny voids and microscopic cracks. Furthermore, the absorbed moisture caused “interfacial debonding,” which is a weakening of the critical chemical bond between the carbon fibres and the surrounding polymer matrix.

The official press release highlights that the internal geometric arrangement of the carbon fibres plays a massive role in environmental resistance. The researchers found that certain fibre layouts retain their structural integrity significantly better than others when exposed to moisture, making some designs inherently more sensitive to moisture-related degradation.

Validating Accelerated Ageing Tests

To ensure aircraft components will remain safe and functional for decades, aerospace engineers rely on “accelerated ageing” tests. These tests expose materials to extreme environmental conditions to simulate years of wear in a highly compressed timeframe. The Monash and RMIT study provides crucial validation for these industry-standard testing methods.

“What we found is that it’s not the exact ageing temperature or humidity that matters most, it’s how much moisture the material ultimately absorbs,” said Dr. Katherine Grigoriou, a researcher and lecturer at the Monash Department of Mechanical and Aerospace Engineering.

Dr. Grigoriou further explained in the release that understanding moisture buildup allows engineers to reliably predict long-term performance.

“Our results show that accelerated ageing methods can still provide reliable predictions of long-term performance, as long as the moisture content in the material is properly understood and controlled,” Dr. Grigoriou added.

Industry Implications for MRO

The implications of this research extend directly to airline operations and aircraft manufacturing. By establishing moisture absorption as the primary metric for composite degradation, Airlines can develop highly accurate predictive models for material aging. According to the research team, these insights will help engineers design more durable composite structures, improve maintenance strategies, and increase overall confidence in the long-term safety of aircraft components.

AirPro News analysis

At AirPro News, we view these findings as a critical stepping stone for the next generation of aircraft design. As the aviation industry continues its aggressive pivot away from metal toward lightweight composites to save fuel and reduce carbon emissions, understanding the exact environmental limits of these materials is paramount. The confirmation that accelerated ageing tests remain valid, provided moisture is tracked, should offer a sigh of relief to regulatory bodies and Manufacturers alike. Furthermore, the revelation that specific fibre orientations can mitigate moisture damage provides manufacturers with an immediate, actionable pathway to design inherently safer and longer-lasting airframes. We anticipate that future aircraft maintenance schedules will increasingly incorporate advanced moisture-tracking diagnostics to ensure passenger safety over the multi-decade lifespan of commercial jets.

Frequently Asked Questions (FAQ)

What is hygrothermal aging?

Hygrothermal aging refers to the degradation of materials, particularly composites, caused by prolonged exposure to a combination of heat and environmental moisture. In carbon fibre composites, this can lead to the weakening of the bond between the fibres and the polymer resin.

Why do modern aircraft use carbon fibre composites?

Carbon fibre reinforced polymers (CFRP) are exceptionally lightweight, extremely strong, and highly resistant to traditional rust and corrosion. Using these materials instead of heavier metals like aluminum helps aircraft burn less fuel and reduce emissions.

Does high temperature directly damage carbon fibre in aircraft?

According to the recent study by Monash University and RMIT, it is not the exact temperature or humidity that matters most, but rather the total amount of moisture the material ultimately absorbs. Heat primarily serves to accelerate this moisture absorption process.

Sources:
Monash University and RMIT Press Release via Medianet

This article is based on an official press release from Diamond Aircraft.

Diamond Aircraft’s Special Mission Aircraft Division has detailed a series of technical advancements completed in 2025 for its flagship multi-purpose platform, the DA62 MPP. The manufacturer also outlined its development roadmap for 2026, signaling a continued focus on expanding the aircraft’s operational versatility and global interoperability.

According to a company press release, the recent upgrades target connectivity, certification, and avionics integration. These enhancements are designed to bolster the DA62 MPP’s performance across various demanding roles, including intelligence, surveillance, and reconnaissance (ISR), law enforcement, and maritime monitoring.

As operators increasingly demand higher payload capacities and robust communication links, Diamond Aircraft is positioning the DA62 MPP to meet these requirements. The newly announced roadmap indicates that the company will continue investing heavily in aerostructures and advanced mission systems over the coming year.

2025 Technical Achievements

Enhanced Connectivity and Payload Capacity

In 2025, Diamond Aircraft focused on expanding the operational limits and communication capabilities of the DA62 MPP. The company reported the successful certification of a Maximum Take-Off Mass (MTOM) increase, raising the limit from 2,300 kg to 2,360 kg. This upgrade allows operators to equip the aircraft with additional sensors, mission equipment, or fuel without sacrificing safety or performance.

Additionally, the manufacturer conducted extensive flight trials over a six-month period to test Starlink Mini connectivity. Flown across Europe and parts of North Africa, these trials validated stable, high-bandwidth airborne connections. Diamond Aircraft noted that this capability supports real-time sensor data streaming and cloud-based workflows, offering a cost-effective alternative to conventional beyond-line-of-sight (BLOS) systems.

Avionics and Weather Certifications

Further improving the platform’s reliability, the DA62 MPP received Flight Into Known Icing (FIKI) certification for specific configurations in 2025. This certification significantly enhances dispatch reliability for operators flying in challenging weather conditions.

The aircraft was also certified with an integrated diversity transponder. According to the press release, this integration improves communication robustness and visibility with both space-based and ground-based ADS-B receivers, ensuring better tracking continuity during low-altitude missions and in remote regions.

2026 Development Roadmap

Aerodynamic and Sensor Integrations

Looking ahead to 2026, Diamond Aircraft has outlined an ambitious roadmap centered on aerodynamic efficiency and sensor versatility. The company plans to introduce an improved BLOS radome designed to reduce aerodynamic drag, thereby enhancing overall system performance.

To improve crew situational awareness, a dedicated tail-mounted camera will be fully integrated into the Garmin G1000 Multi-Function Display (MFD). Furthermore, the manufacturer is developing a dedicated Supplemental Type Certificate (STC) to allow the safe, globally compliant integration of non-eye-safe lasers, which are crucial for advanced mapping operations.

New Mounting and Radar Solutions

The 2026 roadmap also highlights new structural integrations to support multi-role missions. Diamond Aircraft will introduce a new Universal Mounting Frame, known as the I-Frame. This belly structure will serve as a universal interface for payloads such as droppable life rafts for maritime search and rescue or RIEGL VQX-2 LiDAR systems.

Additionally, a newly developed BR800 radar pod is slated for release. This pod will enable the integration of multi-mission surveillance radars, expanding the DA62 MPP’s capabilities in border surveillance, reconnaissance, and maritime operations.

“These advancements reflect Diamond’s ongoing commitment to enhancing mission capability, operational safety, and global interoperability,” the company stated in its official release.

AirPro News analysis

We observe that Diamond Aircraft’s continuous investment in the DA62 MPP highlights a strategic push to dominate the light twin-engine special missions market. By increasing the MTOM to 2,360 kg, the company directly addresses one of the primary constraints of light aerial platforms: payload limitations. The integration of Starlink Mini is particularly noteworthy, as it democratizes high-bandwidth connectivity, a feature traditionally reserved for much larger, more expensive military assets.

The 2026 roadmap suggests a clear focus on modularity. The introduction of the I-Frame and the BR800 radar pod indicates that Diamond Aircraft aims to offer a single platform capable of rapidly switching between diverse mission profiles, from maritime search and rescue to advanced LiDAR mapping. This flexibility is likely to appeal to government and private operators seeking cost-effective, multi-role aviation solutions.

Frequently Asked Questions

What is the new MTOM for the DA62 MPP?

The Maximum Take-Off Mass (MTOM) for the DA62 MPP has been increased and certified from 2,300 kg to 2,360 kg.

What connectivity upgrades were tested in 2025?

Diamond Aircraft conducted six months of flight trials across Europe and North Africa to validate Starlink Mini connectivity, enabling high-bandwidth, real-time data streaming.

What new payload structures are planned for 2026?

The company plans to introduce a Universal Mounting Frame (I-Frame) for payloads like LiDAR or life rafts, as well as a new BR800 radar pod for multi-mission surveillance radars.

Sources

• Diamond Aircraft

This article is based on an official press release from AerFin.

AerFin has successfully finalized the sale of an Airbus A330 airframe to the parts trading division of an undisclosed airline. According to a recent company press release, this transaction is aimed at bolstering the availability of used serviceable material (USM) within the global aviation aftermarket.

As the aviation industry continues to navigate supply chain constraints, airlines and parts traders are increasingly seeking reliable sources of components. The A330 platform, in particular, remains a critical asset for operators looking to sustain their existing fleets while effectively managing operational costs.

This strategic sale highlights the growing importance of end-of-life asset management and the recycling of widebody aircraft to support ongoing global flight operations. By transitioning retired or surplus airframes into the parts ecosystem, the industry can better maintain active fleets.

Sustaining the Widebody Fleet

The demand for dependable aircraft components has driven a robust market for transitioning airframes. In its press release, AerFin noted that A330 airframes continue to play a vital role in helping operators manage cost pressures and maintain fleet reliability.

By placing this specific A330 airframe with an airline’s parts trading arm, AerFin is facilitating the extraction and redistribution of high-value used serviceable material. This process ensures that critical components remain in circulation, supporting the maintenance needs of active A330 aircraft worldwide.

Maximizing Asset Value

AerFin emphasized its expertise across widebody platforms, which allows the company to identify optimal placement opportunities for airframes. The goal is to deliver the maximum operational value from assets that have reached the end of their primary service life but still contain valuable, serviceable parts.

“Widebody airframes remain an important source of material for the industry, particularly for platforms with a long operational life ahead of them. This sale reflects our ability to place assets with customers who understand how to maximise their value,” stated AerFin in the company release.

The Role of Used Serviceable Material (USM)

The transaction underscores a broader industry trend where the full asset lifecycle is carefully managed to keep viable aircraft parts in active use. AerFin’s focus on lifecycle support provides a necessary pipeline of USM for the global aftermarket.

Working with airlines and parts traders globally, the company continues to position aircraft and components where they can offer the most significant economic and operational benefits, ensuring that usable material does not go to waste.

AirPro News analysis

We observe that the sale of widebody airframes for part-out and USM harvesting is becoming increasingly critical in today’s aviation landscape. As new aircraft delivery delays persist and engine maintenance turnaround times remain extended across the industry, operators are heavily reliant on the secondary market to keep their aircraft flying.

The Airbus A330, with its large global footprint and continued operational relevance, is a prime candidate for such lifecycle management. By feeding the USM supply chain, companies like AerFin help alleviate the acute parts shortages that currently challenge airline maintenance schedules, providing a cost-effective alternative to procuring new original equipment manufacturer (OEM) parts.

Frequently Asked Questions

What aircraft type was sold by AerFin?
AerFin completed the sale of an Airbus A330 airframe.

Who purchased the A330 airframe?
According to the press release, the airframe was purchased by the parts trading arm of an airline.

What is the purpose of this transaction?
The sale is intended to support the availability of used serviceable material (USM) across the global aviation aftermarket, helping operators sustain their fleets and manage costs.

Sources

• AerFin