Landing Gear — Main Landing Gear — Brake Fuse/Shuttle Valve Assembly — Failure Caused by Assembly Error
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must inspect the fuse/shuttle valve assembly serial numbers within 8000 flight hours or 48 months from the AD's effective date, whichever comes first, following DHC Service Bulletin 84-32-175. If any affected serial numbers are found, the defective valve assemblies must be removed and replaced before the next flight. Compliance with these actions is mandatory to maintain airworthiness.
Summary
Canadian Airworthiness Directive CF-2024-01 addresses a failure in the brake fuse/shuttle valve assembly caused by a factory assembly error affecting De Havilland Aircraft of Canada Limited DHC-8-401 and DHC-8-402 aeroplanes, serial numbers 4001, 4003, and subsequent. The directive mandates inspection and possible replacement of affected fuse/shuttle valve assemblies to prevent loss of critical landing gear and braking functions. This AD aims to ensure continued safe operation of the affected aircraft models.
What changed
CF-2024-01 introduces a new mandatory inspection requirement for the fuse/shuttle valve assemblies on specified DHC-8-400 series aircraft. It requires operators to inspect serial numbers of these valve assemblies and replace any units identified as defective due to a factory assembly error. This is a newly issued directive rather than an amendment to a previous AD.
Why it matters
This directive is critical for aviation professionals because the identified assembly error can lead to failure of the landing gear brake system, potentially causing loss of powered landing gear extension/retraction, spoilers, nose wheel steering, and normal braking. Compliance ensures aircraft safety and prevents runway excursions, which is vital for operators, maintenance organizations, and compliance teams managing affected DHC-8-400 aircraft.
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- EASA AD CF-2026-38Maintenance Requirements Manual Part 2 - Airworthiness Limitation Items - AmendmentAug 17, 2026
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