AD 2009-16-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Fokker | F | Airworthiness Directives; Fokker Model F.27 Mark 050 Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Fokker Model F.27 Mark 050 Airplanes |
Unsafe Condition
A broken fork of the inner flap outboard drive shaft caused extensive damage to the left hand inner flap and nacelle, resulting in asymmetric flap extension and interference between the flap and the nacelle. The failure was caused by cyclic load due to regularly reaching the mechanical end stop position.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the clearance between the flap mechanical drive nut and the up-and-down stop. Perform a non-destructive inspection of certain components if abutment marks are present or when the up and/or down stop touches the drive nut after a full up or down selection in the hydraulic mode. Readjust the up-stop position if clearance is incorrect. Replace any parts found with cracks during the non-destructive inspection with serviceable parts.
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 F.27 Mark 050 airplanes, all serial numbers, in a post-Fokker Service Bulletin SBF50-27-030 configuration.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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