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CD Aviation Services Acquires STC for Twin Commander Engine Upgrade

CD Aviation Services acquires STC SA1024SO to authorize Honeywell TPE331-5-252K engine upgrades on Twin Commander 690 series, improving maintenance support.

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CD Aviation Services (CDAS), a specialized turbine engine maintenance provider, has officially announced the acquisition of Supplemental Type Certificate (STC) SA1024SO. According to the company’s press release, this certification authorizes the installation of Honeywell TPE331-5-252K engines on the Twin Commander 690, 690A, and 690B Commercial-Aircraft series. The STC, previously associated with Aero Air, LLC, provides a Federal Aviation Administration (FAA)-approved pathway for operators to upgrade their legacy powerplants.

For the legacy aviation community, this acquisition represents a critical development in maintaining the airworthiness of aging fleets. The core of the upgrade involves transitioning the aircraft’s fuel control system from the older Bendix configuration to the more widely supported Woodward system. By bringing this STC in-house, CDAS aims to directly support Twin Commander operators facing growing industry concerns over parts availability and maintenance bottlenecks.

As out-of-production aircraft continue to age, the availability of approved modifications is vital for their continued operation. The official announcement highlights that this STC not only modernizes the engine configuration but also aligns the aircraft with current industry maintenance standards, ensuring these vintage twin-turboprops remain viable for years to come.

Technical Details of the Engine Upgrade

Transitioning from Bendix to Woodward Fuel Systems

The primary technical shift facilitated by STC SA1024SO is the conversion from the Honeywell TPE331-5-251K engine to the TPE331-5-252K engine. According to the provided research data, the most significant change in this upgrade is the replacement of the legacy Bendix Fuel Control Unit (FCU) with a Woodward FCU. The conversion is performed in strict accordance with Honeywell Service Bulletin SB 72-0216, which outlines the necessary steps for transitioning between the two fuel control systems.

Understanding the differences between these two systems is essential to grasping the value of the STC. The legacy Bendix system, found on early TPE331-5 engines, was largely air-based. Historical maintenance data indicates that these units were prone to operational issues, such as moisture freezing within the system. Today, Bendix-equipped engines represent a minority in the active fleet, and operators face severe challenges due to decreasing parts availability and limited overhaul support.

Conversely, the Woodward FCU is a predominantly hydraulic system that has become the industry standard for these engines. While the Woodward system has faced its own historical airworthiness directives, such as AD 2006-15-08, which required a switch from steel to plastic fuel splines to prevent runaway engines, it is vastly more serviceable within the modern aviation maintenance network. Furthermore, upgrading to the Woodward system is a prerequisite for further engine enhancements, such as the -10 upgrade.

Impact on the Twin Commander Fleet

Extending the Lifespan of Legacy Aircraft

The Twin Commander 690 series consists of twin-turboprop executive business aircraft built primarily between 1972 and 1979. Known for their high-wing design, impressive climb rates, and cruise speeds of up to 250+ knots, these aircraft remain popular in the used market. Because the airframes have been out of production for decades, maintaining and upgrading their powerplants is critical for their continued airworthiness.

The acquisition of this STC by CDAS offers tangible benefits to operators of these vintage aircraft. By providing a legal and practical method to replace obsolete Bendix systems, the STC effectively extends the operational lifecycle of the Twin Commander 690 series. Operators will no longer have to hunt for scarce Bendix components, as the -252K configuration offers much broader parts availability across the global supply chain.

Additionally, the Woodward system is widely understood across the global maintenance network. This familiarity leads to expanded overhaul capabilities and potentially lower maintenance downtimes for operators, ensuring that these legacy aircraft can be serviced efficiently by authorized repair stations worldwide.

“This STC provides operators with a clear and practical path forward when evaluating engine upgrades or addressing long-term support concerns. Our focus is on delivering solutions that improve aircraft reliability, maintainability, and overall lifecycle support.”

— CD Aviation Services, via official press release

About CD Aviation Services

Headquartered in Joplin, Missouri, CD Aviation Services has specialized in small turbine engine maintenance for over 20 years. According to company statements, they operate as a Honeywell Authorized Part 145 repair station, focusing specifically on Honeywell TPE331 and TFE731 engines, as well as GTCP36 series Auxiliary Power Units (APUs).

The strategic acquisition of STC SA1024SO expands the company’s in-house capabilities, allowing them to directly support Twin Commander operators rather than relying on third-party certificate holders. This move solidifies their position as a dedicated support hub for legacy Honeywell turbine engines.

AirPro News analysis

We view the acquisition of STC SA1024SO by CD Aviation Services as indicative of a broader trend within the aviation maintenance, repair, and overhaul (MRO) sector. As original equipment manufacturers (OEMs) naturally shift their focus toward newer platforms, specialized MROs are stepping in to acquire the intellectual property and certifications necessary to keep legacy fleets airborne. By taking ownership of this STC, CDAS is not merely offering a repair service; they are actively solving a critical Supply-Chain bottleneck regarding the obsolete Bendix FCU. This proactive approach is essential for the survival of out-of-production airframes like the Twin Commander 690, ensuring that operators have a predictable, FAA-approved path for modernization and continued Compliance.

Frequently Asked Questions (FAQ)

What aircraft does STC SA1024SO apply to?
According to the FAA-approved certificate details, the STC applies specifically to the Twin Commander 690, 690A, and 690B series aircraft.

What is the main difference between the Bendix and Woodward FCU?
The legacy Bendix Fuel Control Unit is an older, air-based system that suffers from parts scarcity and historical reliability issues (such as moisture freezing). The Woodward FCU is a newer, hydraulic-based system that serves as the current industry standard, offering better parts availability and broader maintenance support.

Why is this STC important for Twin Commander operators?
It provides a legal, FAA-approved method to upgrade from the TPE331-5-251K engine to the -252K configuration, allowing operators to abandon the obsolete Bendix fuel system in favor of the supportable Woodward system, thereby extending the aircraft’s operational lifespan.

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Photo Credit: CD Aviation Services

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MRO & Manufacturing

Ramco Systems and Safran Helicopter Engines Sign MoU

Ramco Systems and Safran Helicopter Engines partner to automate engine maintenance data exchange for helicopter operators worldwide.

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Ramco Systems and Safran Helicopter Engines signed a Memorandum of Understanding (MoU) on September 3, 2026, in Chennai, India, to automate the exchange of engine maintenance data between the manufacturer and helicopter operators. The partnership integrates Safran’s engine data directly into Ramco Aviation Software, eliminating manual data entry for post-shop visit records.

According to a press release issued by Ramco Systems, the agreement aims to streamline the flow of engine configuration details, usage metrics, and maintenance events directly into the Maintenance Information System (MIS) used by operators. As a result of this integration, Safran Helicopter Engines will award Ramco the EngineLife Connect label, certifying the software’s compatibility with the manufacturer’s digital ecosystem.

Digital integration for rotorcraft maintenance

The integration targets the administrative burden operators face when updating engine records after maintenance shop visits. By automating this data flow, the companies expect to improve data accuracy, enhance airworthiness tracking, and optimize maintenance planning for Helicopters fleets.

Ramco Aviation Software currently manages more than 4,000 aircraft globally for over 90 aviation organizations, with a user base exceeding 24,000. Sam Jacob, Executive Vice President & SBU Head for Aviation, Aerospace and Defense at Ramco Systems, highlighted the platform’s role in connecting original equipment OEMs and operators.

“With several of the world’s largest helicopter operators on our platform, Ramco sits at a unique intersection of the aviation MRO ecosystem, connecting OEMs and operators through a single digital backbone,” Jacob stated.

Expanding the EngineLife Connect ecosystem

Safran Helicopter Engines has produced over 75,000 helicopter turbines since its founding and supports more than 2,500 customers across 155 countries. The EngineLife Connect label designates third-party systems that successfully interface with Safran’s data networks, ensuring operators receive verified OEM information directly into their own systems.

Jacob noted that the Partnerships provides Safran with richer engine maintenance data to monitor reliability, while operators benefit from reduced manual workload. He added that Ramco Aviation Software utilizes artificial intelligence and agentic Automation to facilitate this connected ecosystem.

AirPro News analysis

We view this MoU as a logical progression in the rotorcraft industry’s push toward digital continuity. Helicopter operators frequently struggle with fragmented data silos, especially when transferring complex engine records between maintenance, repair, and overhaul (MRO) providers and internal tracking systems. By establishing a direct data pipeline between a major engine manufacturer and a widely used MIS, both parties reduce the risk of human error in airworthiness compliance. This partnership also strengthens Ramco’s position in the aviation Software market by securing a formal endorsement from a leading rotorcraft turbine manufacturer.

Sources: Ramco Systems

Photo Credit: Ramco Systems

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MRO & Manufacturing

JCB Aero Gains Part 145 Approval for Boeing 737 Family

JCB Aero receives Part 145 approval for Boeing 737 base and line maintenance, expanding beyond its Airbus MRO operations in Auch, France.

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JCB Aero has secured Part 145 maintenance approval to perform base and line maintenance on the Boeing 737 aircraft family, expanding the French facility’s capabilities beyond its established Airbus operations.

The approval, received in August 2026 and announced by the company on September 3, 2026, covers the Boeing 737-600, Boeing 737-700, Boeing 737-800, and Boeing 737-900 variants. Located in Auch, near Toulouse, the subsidiary of the AMAC Aerospace Group initially launched its MRO operations in October 2024 with a focus on Airbus airframes.

Expanding MRO capabilities in Auch

The addition of Boeing 737 maintenance authorization allows JCB Aero to capture a broader segment of the narrowbody market. The company stated it has already begun issuing quotations for Boeing operators and expects to induct the first 737 airframes into its hangar in the coming months.

This expansion follows a period of high utilization for the Auch facility. Earlier in 2026, AMAC Aerospace reported full hangar capacity at the site, driven by maintenance and modification projects on Airbus Corporate Jets, specifically the ACJ318 and ACJ319 platforms.

Management perspective on the Boeing approval

The certification aligns with recent leadership transitions at the company, including the March 2026 appointment of Sébastien Kubler as Chief Operating Officer. Kubler previously served as the technical director of production and engineering for the firm.

In a statement regarding the new certification, Kubler highlighted the strategic value of the dual-manufacturer capability:

“Receiving this Boeing approval marks an important milestone in the development of JCB Aero’s MRO activities. Adding the Boeing 737 family to our existing Airbus capabilities enables us to serve a wider range of customers and further strengthens our position as a flexible and responsive MRO partner. This achievement is also a great recognition of the commitment and expertise of our teams.”

AirPro News analysis

Securing Part 145 approval for the Boeing 737 family represents a logical progression for JCB Aero as it matures its MRO footprint in southern France. By diversifying its capabilities to include both major narrowbody platforms, the facility reduces its exposure to single-manufacturer fleet dynamics. We view this dual-platform capability as a standard requirement for independent MRO providers seeking to maximize hangar utilization and attract mixed-fleet operators.

Sources: JCB Aero, AMAC Aerospace

Photo Credit: JCB Aero

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MRO & Manufacturing

AnimaWings Selects SAMCO for A220 Base Maintenance

AnimaWings signs SAMCO as A220 base maintenance provider and inducts another A220-300 via Maastricht Aachen Airport.

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Romanian operator AnimaWings has inducted another Airbus A220-300 into its growing fleet following the completion of livery and engineering work by SAMCO Aircraft Maintenance and MAAS Aviation. The aircraft’s release to service coincides with a formal agreement signed on September 3, 2026, designating SAMCO as the base maintenance provider for the airline’s A220 operations.

The preparation of the new narrowbody aircraft took place at Maastricht Aachen Airport (MST) in the Netherlands. According to a company statement, SAMCO partnered with neighboring facility MAAS Aviation to provide an integrated induction solution for the carrier.

Integrated maintenance and livery operations

The induction process required coordination between specialized aviation service providers at the Dutch airport. MAAS Aviation completed the aircraft painting and livery application, while SAMCO managed the regulatory and engineering requirements necessary for commercial operations.

SAMCO utilized its European Union Aviation Safety Agency (EASA) Part 21 approval to manage the workscope preparation and design elements of the induction. Following the physical painting process, the maintenance provider officially released the aircraft into commercial service under its Part 145 certification. In its announcement, SAMCO stated the co-located collaboration ensured a “smooth transition from the paint shop to the skies.”

AnimaWings fleet expansion and maintenance strategy

The recent aircraft delivery aligns with a broader operational partnership between the Romanian carrier and the Dutch maintenance, repair, and overhaul (MRO) provider. AviTrader reported that on September 3, 2026, AnimaWings officially selected SAMCO to provide tailored base maintenance services for its expanding Airbus A220 fleet to ensure long-term operational availability and reliability.

AnimaWings is currently executing a fleet modernization strategy with a stated target of operating 18 aircraft by the end of 2027. The airline has centered this growth on the Airbus A220-300. According to Skies Mag, the aircraft type delivers a 25% reduction in fuel burn and carbon dioxide emissions per seat compared to previous-generation aircraft, supporting the carrier’s efficiency targets.

AirPro News analysis

We view the co-location of specialized aviation services at regional hubs like Maastricht Aachen Airport as a significant advantage for growing carriers. By utilizing adjacent facilities for painting and engineering release, operators can minimize non-revenue repositioning flights and reduce overall aircraft downtime. For a carrier like AnimaWings scaling rapidly toward an 18-aircraft fleet, securing a dedicated base maintenance provider that can also manage induction workflows provides critical operational stability during a period of high growth.

Sources: SAMCO Aircraft Maintenance

Photo Credit: AnimaWings

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