Flight Controls — Elevator and Rudder Power Control Units (PCUs) Rod End Fractures
- Published
- Effective
- Replaces
- CF-2023-03
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of the affected MHI RJ Aviation ULC aircraft must perform specified operational checks and detailed inspections of the rudder and elevator PCUs according to the updated AMM tasks within 200 flight hours or 3 months from the effective date, whichever occurs first. Return-to-service procedures must be followed after any storage period as outlined in the directive. Compliance with these tasks must continue at specified intervals to maintain airworthiness.
Summary
EASA Airworthiness Directive CF-2025-70 addresses rod end fractures in the elevator and rudder Power Control Units (PCUs) on MHI RJ Aviation ULC models CL-600-2B19, CL-600-2C10, CL-600-2C11, CL-600-2D15, CL-600-2D24, and CL-600-2E25 aircraft. The directive mandates operational checks and inspections to detect potential PCU disconnects that could lead to loss of control surface function or inadequate flutter suppression. It applies to all serial numbers of the affected aircraft models.
What changed
EASA Airworthiness Directive CF-2025-70 supersedes AD CF-2023-03 and retains its requirements while introducing updated Aircraft Maintenance Manual (AMM) tasks for earlier detection of PCU rod end issues. The directive revises the timing and procedures for operational checks of rudder and elevator PCUs, including specific AMM tasks 27-23-01-710-802 and 27-33-01-710-801. It also clarifies return-to-service requirements following short-term and long-term storage for the affected aircraft.
Why it matters
This directive is critical for aviation professionals as it enhances the detection of PCU rod end failures that could cause control surface disconnects, posing safety risks. Operators and maintenance organizations must comply to prevent potential loss of elevator or rudder control, which could compromise flight safety. The updated requirements ensure timely inspections and operational tests, improving aircraft reliability and regulatory compliance.
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