AD Amdt-39-10412
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Fokker | F28 Mark 1000 Through 4000 | Airworthiness Directives; Fokker Model F28 Mark 1000 Through 4000 Series Airplanes |
Unsafe Condition
Sudden movement of the MLG actuator under extreme inward sideload conditions may pressurize the downlock-actuator and lift the toggle-links, potentially causing MLG collapse and reduced controllability during landing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace certain flexible hydraulic hoses connecting to the UP-port of the MLG actuator with new hoses featuring built-in restrictor check-valves.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Fokker Model F28 Mark 1000 through 4000 series airplanes where restrictor check-valves are not installed on MLG actuator hoses.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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