Wings — Cracked Spoiler Actuator Bracket
- Published
- Effective
- Deadline
- Replaces
- 2018-21
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform initial and periodic inspections of the specified spoiler actuator brackets according to Bombardier Service Bulletin 84-27-72 Revision A or later. If cracks are found, both brackets must be replaced before the next flight with new-design parts. Replacement deadlines depend on accumulated flight hours, with specific thresholds outlined for inspection and replacement schedules.
Summary
The Canadian Airworthiness Directive CF-2018-21R1 addresses cracked spoiler actuator brackets on Bombardier DHC-8-400 series aircraft, specifically models -400, -401, and -402 with serial numbers 4001 to 4547. This directive mandates inspections and replacement of the external spoiler actuator brackets to ensure continued airworthiness and safe operation. It provides detailed instructions for initial and periodic inspections as well as part replacements.
What changed
CF-2018-21R1 revises the original directive CF-2018-21 by correcting the service bulletin date and clarifying part numbers for the external spoiler actuator brackets and their assemblies. The revision maintains the original requirements for inspections and replacement but updates references to the applicable service bulletin revision and part numbers.
Why it matters
This directive is critical for operators and maintenance organizations to prevent potential failure of spoiler actuator brackets caused by fatigue cracks. Failure to comply could lead to spoiler malfunction, adversely affecting flight control and landing safety. Ensuring compliance helps maintain aircraft structural integrity and operational safety.
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- EASA AD CF-2026-38Maintenance Requirements Manual Part 2 - Airworthiness Limitation Items - AmendmentAug 17, 2026
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