FAA Approves Hartzell AeroForce Clamp, Resolving GA Grounding Threat

The Federal Aviation Administration (FAA) has approved a new component from Hartzell Engine Technologies, providing a long-awaited solution to a safety mandate that threatened to ground thousands of aircraft. On February 27, 2026, the agency granted Parts Manufacturer Approval (PMA) for the AeroForce V-Band Clamp, a critical part for turbocharged general aviation aircraft that connects the turbocharger to the exhaust system. The approval directly addresses the widespread parts shortage and operational challenges created by a 2023 safety directive.

The new clamp offers a permanent resolution for aircraft owners affected by Airworthiness Directive (AD) 2023-09-09, which imposed a strict 500-hour life limit on legacy spot-welded, multi-segment exhaust couplings. According to the FAA's regulatory evaluation, this directive impacted an estimated 41,058 aircraft and engines. The subsequent scarcity of compliant replacement parts created a significant bottleneck, particularly after an interim inspection allowance expired on July 17, 2025, forcing many non-compliant aircraft to be grounded.

Regulatory Background and Industry Impact

The original AD was issued to address an unsafe condition related to the failure of certain v-band couplings, which could lead to exhaust leaks, in-flight fires, and carbon monoxide entering the cabin. The 2023 directive mandated repetitive inspections and the strict 500-hour life limit for spot-welded units, while riveted and single-piece couplings were given a 2,000-hour limit. This created immediate and intense demand for replacement parts that the supply chain could not meet, a situation advocacy groups like the Aircraft Owners and Pilots Association (AOPA) worked to resolve.

The approval of the Hartzell AeroForce clamp under FAA PMA Supplement 96 effectively terminates the recurring inspection requirements of the AD for aircraft that install the new component. Marolous Cebulka, VP of Sales & Marketing at Hartzell Aviation, stated that the approval confirms the AeroForce design delivers a compliant solution to legacy issues, noting that "something as small as a clamp can ground an aircraft." Jim Coon, AOPA Senior VP of Government Affairs and Advocacy, commended Hartzell for its investment, calling the new clamp "a viable alternative to grounding thousands of aircraft."

For aircraft owners and maintenance providers, the impact is immediate. The new clamp eliminates the burdensome inspection cycles and removes the risk of being grounded due to parts unavailability. Hartzell has priced the new components at approximately $1,495 for Lycoming engines and $805 for Continental engines.

AeroForce Clamp vs. Legacy Spot-Welded Couplings

The technical design of the AeroForce clamp directly addresses the failure points of the older spot-welded models. It replaces the problematic welds and rivets with a more durable braided wire cable and a floating retainer, engineered to better withstand the high heat and vibration environment of a turbocharged exhaust system.

Broader Context and Precedents

This situation is reminiscent of another recent general aviation parts crisis. In August 2022, the FAA issued AD 2022-16-03 for certain Bendix S-1200 magnetos, which mandated inspections and replacements for units missing required grease. Similar to the v-band clamp issue, this created a widespread parts demand affecting many Continental and Lycoming engines, highlighting the vulnerability of the general aviation fleet to single-point supply chain failures prompted by safety directives.

The resolution of the v-band clamp shortage underscores a trend where third-party manufacturers like Hartzell are stepping in to engineer solutions for legacy fleet issues that might not be a priority for original equipment manufacturers. This proactive development of PMA-approved parts is becoming a critical lifeline for maintaining the airworthiness of an aging GA fleet.

What Comes Next

With the FAA approval secured, Hartzell Engine Technologies is moving to address the significant backlog of demand. According to the company, shipments of the new AeroForce V-Band Clamps are expected to commence in late March 2026. This will allow maintenance, repair, and overhaul (MRO) facilities to begin clearing grounded aircraft and scheduling the replacement for operators who were nearing their 500-hour time limit.

Why This Matters

This development is more than just an approval for a single aircraft part; it represents a critical relief valve for the entire turbocharged general aviation sector. It resolves a significant safety and supply chain crisis that had the potential to disrupt thousands of private and commercial operations. The episode serves as a powerful case study on how a focused Airworthiness Directive, while necessary for safety, can create widespread economic and logistical challenges that require a concerted industry response to solve.