AD 79-20-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Fokker Services | F27 Mark 100 | FOKKER-VFW Model F-27 Mark 100, 200, 300, 400, 500, 600, 700 Airplanes |
| aircraft | Fokker Services | F27 Mark 200 | FOKKER-VFW Model F-27 Mark 100, 200, 300, 400, 500, 600, 700 Airplanes |
| aircraft | Fokker Services | F27 Mark 300 | FOKKER-VFW Model F-27 Mark 100, 200, 300, 400, 500, 600, 700 Airplanes |
| aircraft | Fokker Services | F27 Mark 400 | FOKKER-VFW Model F-27 Mark 100, 200, 300, 400, 500, 600, 700 Airplanes |
| aircraft | Fokker Services | F27 Mark 500 | FOKKER-VFW Model F-27 Mark 100, 200, 300, 400, 500, 600, 700 Airplanes |
| aircraft | Fokker Services | F27 Mark 600 | FOKKER-VFW Model F-27 Mark 100, 200, 300, 400, 500, 600, 700 Airplanes |
| aircraft | Fokker Services | F27 Mark 700 | FOKKER-VFW Model F-27 Mark 100, 200, 300, 400, 500, 600, 700 Airplanes |
Unsafe Condition
Fatigue failure of improperly machined nose wheel axles (Dowty Rotol P/N 9009Y12).
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Required Actions
Inspect the bore of the nose wheel axle within 500 hours time in service or at the next nose wheel change, whichever comes first. Identify or replace axles based on undercut presence, wall thickness (less than 0.115 inches), or transition smoothness. Inspect spares and ensure compliance with service bulletins or FAA-approved equivalents.
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Compliance Time
Within the next 500 hours time in service after the effective date of this AD or at the next nose wheel change, whichever occurs first.
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Affected Aircraft
Fokker-VFW Model F-27 Mark 100, 200, 300, 400, 500, 600, 700 airplanes with Dowty Rotol nose landing gear assembly other than types 200565001, 200568001, or 200678001, excluding serial numbers 10549, 10561, 10562, and 10563, up to serial 10569.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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