EASA AD 2024-0237-E
Rotors Flight Control — Tail Rotor Actuator — Inspection
Summary
EASA Airworthiness Directive 2024-0237-E is an emergency directive addressing the tail rotor actuator on MBB-BK117 C-2 helicopters. It mandates inspections of the tail rotor actuator part number B673M40A1002 due to reported vibrations and a worn, broken bolt that could lead to loss of helicopter control. The directive applies to all serial numbers of this helicopter model and requires repetitive inspections and corrective actions as necessary.
What Changed
This new emergency airworthiness directive introduces mandatory repetitive inspections of the tail rotor actuator on affected MBB-BK117 C-2 helicopters. It requires inspections before the next flight after the effective date and at intervals not exceeding 400 flight hours or 12 months. Corrective actions must be taken if discrepancies are found, and a single ferry flight is allowed to reach a maintenance location for the initial inspection.
Why It Matters
This directive is critical for aviation professionals because it addresses a safety issue that could result in loss of helicopter control. Operators and maintenance organizations must comply to ensure continued airworthiness and avoid operational disruptions. Compliance teams need to integrate these inspections into maintenance schedules to meet regulatory requirements and maintain safe flight operations.
What To Do
Operators of MBB-BK117 C-2 helicopters must inspect the tail rotor actuator part number B673M40A1002 before the next flight after 11 December 2024 and then at intervals not exceeding 400 flight hours or 12 months. If any wear or damage is found, corrective actions must be performed before further flight, following Airbus Helicopters' repair instructions. A ferry flight of up to 5 flight hours without passengers is permitted to reach a maintenance facility for the initial inspection.