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.”

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.

Sources

• CD Aviation Services

JCB Aero Reports Full MRO Capacity in Early 2026

This article is based on an official press release from AMAC Aerospace.

JCB Aero, a French aviation service provider and subsidiary of AMAC Aerospace, has reported a highly successful start to 2026 for its Maintenance, Repair, and Overhaul (MRO) division. According to a May 15, 2026, press release from the company, its 5,000-square-meter hangar in Auch, France, is currently operating at full capacity.

The facility, which officially launched its MRO capabilities in October 2024, currently has all three of its aircraft slots occupied by Airbus Corporate Jets (ACJ). This surge in activity underscores the rapid market penetration JCB Aero has achieved since expanding beyond its traditional cabin interior services to offer comprehensive heavy maintenance.

Full Capacity at the Auch Facility

The recent press release details three concurrent Airbus projects currently being managed by the JCB Aero team. The hangar, designed to accommodate up to three single-aisle aircraft simultaneously, is fully utilized by a mix of scheduled inspections and bespoke modifications.

Specific Aircraft Projects

The first aircraft in the hangar is an Airbus ACJ 318, which recently underwent a C2 maintenance check alongside minor modifications. Company officials noted that specific tasks for this aircraft included the removal of skillets and a toaster, as well as the repainting of the aircraft’s registration number.

Additionally, two Airbus ACJ 319 aircraft arrived at the Auch facility for scheduled maintenance. The first ACJ 319 is undergoing 6-month and 18-month maintenance inspections. The second ACJ 319 required 6-month and 12-month inspections, along with the installation of new main wheel tires. Notably, the second ACJ 319 arrived with a broken cabin door, which JCB Aero’s in-house cabinet shop successfully repaired in just one week, according to the company’s statement.

Strategic Growth and In-House Capabilities

JCB Aero was originally founded in 1987, building a strong reputation as a French leader in the luxury design and manufacturing of civil, VIP, and helicopter cabins. Following its acquisition by the Swiss-based AMAC Aerospace Group in May 2016, the company strategically expanded into MRO operations. By October 2025, marking its one-year anniversary of receiving Part 145 MRO approval, JCB Aero had already completed over 20 maintenance projects.

Leadership Perspective

The company attributes this rapid growth to customer trust and operational efficiency. Sébastien Kubler, Chief Operating Officer at JCB Aero, highlighted this momentum in the recent press release:

“We are proud to see such a remarkable number of prestigious aircraft passing through our facilities. It reflects the trust our customers place in our teams and capabilities. Our objective is clear: to maintain this momentum and continue delivering the highest standards of quality and service in the months ahead.”

AirPro News analysis

We observe that JCB Aero’s ability to repair an ACJ 319 cabin door in just one week highlights a distinct competitive advantage in the VIP aviation sector. Because the company originated as a bespoke cabin interior and cabinetry specialist, it can seamlessly blend heavy mechanical maintenance with high-end interior repairs without the need to outsource, significantly reducing downtime for operators. Furthermore, the facility’s strategic location in Auch, in close proximity to Toulouse, the European hub of Airbus manufacturing, provides a significant logistical edge for sourcing parts, recruiting specialized engineering talent, and attracting regional Airbus operators.

Frequently Asked Questions (FAQ)

What aircraft can JCB Aero accommodate?
According to company specifications, the 5,000-square-meter hangar in Auch can accommodate up to three single-aisle aircraft simultaneously, such as the Airbus A320 family or Boeing 737 series.

When did JCB Aero launch its MRO division?
The company officially expanded into MRO operations in October 2024, receiving its Part 145 MRO approval after operating primarily as a cabin interior specialist since 1987.

Sources

• AMAC Aerospace

This article is based on an official press release from SIA Engineering Company Limited (SIAEC), with supplementary financial and market context summarized from reporting by Aviation Week, The Edge Singapore, and The Smart Investor.

SIAEC Opens Major Base Maintenance Facility in Subang, Malaysia

On May 22, 2026, Singapore-based SIA Engineering Company Limited (SIAEC) officially inaugurated Base Maintenance Malaysia Sdn. Bhd. (BMM), a wholly-owned base maintenance facility located at Sultan Abdul Aziz Shah Airport in Subang, Malaysia. According to the company’s official press release, the new site significantly expands SIAEC’s regional Maintenance, Repair, and Overhaul (MRO) network, supplementing its existing hangar operations in Singapore and the Philippines.

The opening of the Subang facility highlights a strategic push by SIAEC to achieve geographical expansion amid surging global demand for aircraft maintenance. By establishing a major footprint in neighboring Malaysia, the company aims to offer its Airlines customers greater flexibility while tapping into a growing local aerospace ecosystem.

The inauguration ceremony was officiated by Yang Berhormat Tuan Sim Tze Tzin, Malaysia’s Deputy Minister of Investment, Trade and Industry, underscoring the project’s importance to the Malaysian government’s broader aerospace ambitions.

Facility Capabilities and Operational Milestones

Expanding Regional MRO Capacity

According to reporting by Aviation Week and the official SIAEC press release, the new BMM facility spans 590,000 square feet. The site features two maintenance hangars designed to accommodate up to six concurrent aircraft checks. This capacity injection is critical for SIAEC as it navigates a constrained operational footprint in its home base of Singapore.

The Subang facility is equipped to provide scheduled heavy maintenance checks, such as comprehensive C-checks, alongside structural repairs, modifications, and retrofits. The company stated that the hangars support both widebody and narrowbody aircraft, specifically noting capabilities for next-generation models including the Airbus A350, Boeing 777, and Boeing 787.

While the official opening took place in May 2026, BMM has already achieved significant operational milestones. The press release notes that the facility obtained regulatory approvals for its first hangar late last year and successfully completed its inaugural aircraft check, a C-check for a Singapore Airlines Airbus A350-900, in November 2025.

“Today marks an important milestone for BMM. We are grateful for the support of the Government of Malaysia, the Selangor State Government, our regulators, customers, partners and employees. BMM is committed to building a trusted and competitive base maintenance hub within the SIAEC Group.”

Strategic Significance and Market Context

Deepening the Malaysian Footprint

SIAEC leadership cited Malaysia’s strong aviation heritage, strategic geographic location, established infrastructure, and growing pool of skilled aerospace talent as primary drivers for the investment. The BMM facility is not SIAEC’s first venture into the Malaysian market. According to the company, it already holds stakes in three other joint ventures within the country: Asia Pacific Aircraft Component Services, Eaton Aero Services, and Pos Aviation Engineering Services.

“BMM is a strategic investment for SIAEC to drive sustainable long-term growth… We see strong potential in Malaysia’s aerospace sector, particularly in talent development, technical capability and long-term industry growth.”

Balancing Growth with Expansion Costs

SIAEC has benefited from a strong post-pandemic aviation recovery. According to financial data reported by The Smart Investor in late 2025, the company saw a 26.5 percent year-over-year turnover increase to S$729 million in the first half of FY25/26, with profit after tax rising over 21 percent to S$83.3 million. The company recently reported higher overall earnings for the full FY2026.

Despite these strong earnings, market analysts have expressed near-term caution. Reporting by The Edge Singapore indicates that analysts have recently trimmed SIAEC’s target stock prices due to gestation costs associated with expansion projects like the Subang facility, as well as potential macroeconomic slowdowns linked to geopolitical tensions.

However, industry experts maintain that the company’s long-term strategy is sound. In a May 2026 research note, OCBC Group Research analyst Ada Lim highlighted the importance of these physical expansions.

“We think SIAEC’s long-term growth trajectory remains intact, supported by capacity and geographical expansion.”

AirPro News analysis

We observe that the opening of the Subang facility is a textbook example of the “spillover” strategy currently dominating the Southeast Asian aviation market. Severe land and labor constraints in Singapore are actively pushing aviation giants like SIAEC to build heavy maintenance capacity in neighboring countries. Malaysia, and specifically the Sultan Abdul Aziz Shah Airport in Subang, is rapidly becoming a major beneficiary of this trend.

Furthermore, to combat these geographical and labor constraints, SIAEC has been heavily investing in artificial intelligence, robotics, and Automation across its network. The integration of these technologies at new facilities like BMM will likely be a key differentiator as the company seeks to balance aggressive physical expansion with the near-term operational costs flagged by market analysts.

Frequently Asked Questions

Where is the new SIAEC base maintenance facility located?

The new facility, operated by Base Maintenance Malaysia Sdn. Bhd. (BMM), is located at Sultan Abdul Aziz Shah Airport in Subang, Selangor, Malaysia.

What types of aircraft can the Subang facility service?

According to SIAEC, the facility can handle both widebody and narrowbody aircraft, including next-generation models such as the Airbus A350, Boeing 777, and Boeing 787.

Sources

• SIA Engineering Company Limited (SIAEC) Official Press Release