AD 2026-16-05: Airbus Helicopters

What the FAA requires

The FAA is adopting a new airworthiness directive (AD) for certain Airbus Helicopters Model AS350B2 helicopters. This AD was prompted by a report of magnetization on the solenoid valves for the three main servo-controls, the regulator block, and the tail servo- control due to a diode not properly installed in the hydraulic circuit. This AD requires performing a cut-off test of the rear rotor actuator valve and, depending on the results of the test, performing corrective actions. The FAA is issuing this AD to address the unsafe condition on these products.

Read the full directive on the Federal Register →

Applicability

This AD applies to all Airbus Helicopters Model AS350B2 helicopters as specified in European Union Aviation Safety Agency AD 2025-0263, dated November 26, 2025; corrected December 9, 2025 (EASA AD 2025-0263). (d) Subject Joint Aircraft System Component (JASC) Code 2900, Hydraulic power system. (e) Unsafe Condition This AD was prompted by a report of magnetization on the solenoid valves for the three main servo-controls, the regulator block, and the tail servo-control due to a diode not properly installed in the hydraulic circuit. The FAA is issuing this AD to prevent loss of the efficiency of the yaw load compensator and of hydraulic assistance for the three main servo-controls and the tail

Part numbers this directive names

This directive does not name specific part numbers in its text; it applies by aircraft model. See the applicability above and the manufacturer's service bulletin it references.