AD 2010-22-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Fokker | Services B | Airworthiness Directives; Fokker Services B.V. Model F.28 Mark 0070 and 0100 Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Fokker Services B.V. Model F.28 Mark 0070 and 0100 Airplanes |
Unsafe Condition
The hydraulic return line from the main landing gear (MLG) selector valve is partially blocked by pieces of hard plastic from the poppet seat of an unmodified parking brake shut-off valve (PBSOV) Part Number 70379, potentially leading to MLG failure to extend and loss of control during landing.
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Required Actions
Within 30 days after the effective date, perform a detailed inspection of the hydraulic lines associated with the PBSOV for contamination. If contamination is found, remove it before further flight. Replace each unmodified PBSOV with a modified unit.
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Compliance Time
Within 30 days after the effective date
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Affected Aircraft
Fokker Services B.V. Model F.28 Mark 0070 and 0100 airplanes, all serial numbers.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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