Hartzell Awarded PMA Approval for Patent-Pending AeroForce V-Band Clamp

MONTGOMERY, Alabama — Hartzell Engine Tech has received FAA PMA approval for its patent-pending AeroForce V-Band Clamp.

The approval provides aircraft owners with a certified replacement option as they comply with Airworthiness Directive 2023-09-09 requirements affecting turbocharged piston exhaust systems.

The AD established a 500-hour life limit on spot-welded, multi-segment V-Band couplings. It also mandates repetitive inspections following reports of in-service failures. The directive applies to certain turbocharged, reciprocating engine-powered airplanes and helicopters, as well as specific turbocharged reciprocating engines with affected V-Band couplings installed.

Since the interim inspection allowance ended July 17, 2025, many aircraft owners must now install compliant replacements, according to Hartzell officials.

The AeroForce V-Band Clamp is approved under FAA PMA Supplement 96 following completion of testing, inspections, and regulatory findings.

“Operators have been managing legacy design issues, inspection burdens, and limited parts availability for some time,” said Marolous Cebulka, Vice President of Sales & Marketing at Hartzell Aviation. “This approval confirms AeroForce delivers a compliant and durable solution engineered to address known failure points in traditional clamps.”

“Something as small as a clamp can ground an aircraft,” Cebulka added. “Our goal is to provide a certified option that restores confidence and supports long-term reliability.”

According to company officials, highlights include:

• Patent-pending design validated through engine cell testing and OEM evaluations
• Aeroforce design reduces resistance welds and rivets compared to traditional clamp designs
• Braided wire cable and floating retainer improve durability and ease of installation
• Approved for applicable installations as defined in PMA Supplement 96

The AeroForce V-Band Clamp is now entering production. Part numbers and ordering information are available through authorized Hartzell distributors.

For more information: Hartzell.aero