AD 86-03-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Fokker Services | F27 Mark 050 | Airworthiness Directives; FOKKER B.V. Model F27 Airplanes |
| aircraft | Fokker Services | F27 Mark 100 | Airworthiness Directives; FOKKER B.V. Model F27 Airplanes |
| aircraft | Fokker Services | F27 Mark 200 | Airworthiness Directives; FOKKER B.V. Model F27 Airplanes |
| aircraft | Fokker Services | F27 Mark 300 | Airworthiness Directives; FOKKER B.V. Model F27 Airplanes |
| aircraft | Fokker Services | F27 Mark 400 | Airworthiness Directives; FOKKER B.V. Model F27 Airplanes |
| aircraft | Fokker Services | F27 Mark 500 | Airworthiness Directives; FOKKER B.V. Model F27 Airplanes |
| aircraft | Fokker Services | F27 Mark 600 | Airworthiness Directives; FOKKER B.V. Model F27 Airplanes |
| aircraft | Fokker Services | F27 Mark 700 | Airworthiness Directives; FOKKER B.V. Model F27 Airplanes |
Unsafe Condition
Unselected flap extension due to failure of the flap down limit switch causing improper prestall warning power supply wiring.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Isolate the prestall warning power supply wires from the flap down limit switch per Fokker Service Bulletin F27/34-52. Alternate means of compliance may be used if approved by the FAA Manager, Standardization Branch.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 60 days after the effective date of this AD
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Affected Aircraft
FOKKER B.V. Model F27 Mark 050, 100, 200, 300, 400, 500, 600, serial numbers 10102 to 10642 inclusive, and 10644.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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