AD 93-21-01
Unsafe Condition
Overheated brakes and blown tires, which would lead to loss of braking performance and may cause the loss of directional control of the airplane while it is on the ground.
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Required Actions
Remove the hydraulic system return filters with part numbers QA05775 and QA05777, and install improved filters with part numbers QA07236 and QA07237, following Fokker Service Bulletin SBF100-29-021. Prohibit installation of the original filters (QA05775/QA05777) on affected airplanes.
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Compliance Time
Within 7 months after the effective date of this AD
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Affected Aircraft
FOKKER Model F28 Mark 0100 series airplanes; serial numbers 11244 through 11363, inclusive, and 11408; certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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