Hydraulic Power — Servo Actuator Piston Rod — Corrosion and Cracking
- Published
- Effective
- Deadline
- Replaces
- 2010-29R1
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must inspect and, if necessary, rectify the servo actuators within 5 hours air time upon receiving the original AD. Following inspection, a complete overhaul or upgrade must be completed within specified time limits ranging from 1200 to 3000 hours air time or 12 to 48 months, depending on inspection results. Installation of servo actuator P/N 222-382-001-107 is prohibited unless it complies with the inspection requirements. Compliance with the referenced Bell Textron Canada Limited Alert Service Bulletins is mandatory.
Summary
Canadian Airworthiness Directive CF-2010-29R2 addresses corrosion and cracking issues in the hydraulic servo actuator piston rods of Bell Textron Canada Limited model 222, 222B, 222U, 230, and 430 helicopters equipped with part number 222-382-001-107. The directive mandates inspections, rectifications, overhauls, or upgrades of affected servo actuators to prevent potential loss of helicopter control. It provides detailed compliance instructions referencing specific Bell Textron Canada Limited Alert Service Bulletins.
What changed
CF-2010-29R2 revises the previous AD CF-2010-29R1 by removing specific overhaul interval details to allow future adjustments through standard overhaul revision procedures. It maintains inspection and corrective action requirements but updates compliance timelines and references newer revisions of the applicable service bulletins. The revision also clarifies eligibility for installation of affected servo actuators.
Why it matters
This directive is critical for aviation professionals to ensure the structural integrity and safe operation of hydraulic servo actuators on affected Bell helicopters. Failure to comply could lead to corrosion-induced cracking, risking loss of helicopter control. Operators, maintenance organizations, and compliance teams must adhere to the inspection and overhaul requirements to maintain airworthiness and regulatory compliance.
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