EASA AD 2019-0104
Landing Gear — Main Landing Gear Hydraulic Hose Assemblies — Replacement
Summary
EASA Airworthiness Directive 2019-0104 is an airworthiness directive addressing the replacement of main landing gear hydraulic hose assemblies on Fokker F28 aeroplanes, including Mark 0070, 0100, 1000, 2000, 3000, and 4000 models. The directive mandates replacing certain hose assemblies with updated parts featuring strengthened restrictor check valves to ensure safe landing gear operation.
What Changed
This directive supersedes previous directives RLD AD (BLA) 94-095 and EASA AD 2015-0077 by cancelling their requirements and introducing a new mandatory replacement of affected hydraulic hose assemblies with serviceable parts that have improved filter screens. It updates the maintenance requirements to prevent hydraulic lock and landing gear extension failures caused by debris blockage.
Why It Matters
Compliance with EASA Airworthiness Directive 2019-0104 is critical to prevent main landing gear collapse or failure to extend, which could lead to runway excursions and potential damage or injury. Operators and maintenance organizations must ensure the use of serviceable hose assemblies to maintain aircraft safety and regulatory compliance.
What To Do
Operators of affected Fokker F28 aeroplanes must replace all hydraulic hose assemblies with part numbers 97867-1 or 97867-3 by serviceable parts with part numbers A25509-01 or A25629-01 within 18 months of 24 May 2019. After replacement, installation of affected hose assemblies is prohibited. The replacement must follow the instructions in the applicable Fokker Services Service Bulletins.
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