AD 99-02-07
Unsafe Condition
Loss of primary hydraulic stabilizer control during use of certain emergency procedures, which could result in inability of the flight crew to control the airplane.
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Required Actions
Modify the power supply system of the horizontal stabilizer control unit in accordance with Fokker Service Bulletin SBF100-27-071. An alternative method of compliance or adjustment of compliance time may be approved if submitted through an appropriate FAA Principal Maintenance Inspector.
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Compliance Time
Within 12 months after the effective date of this AD
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Affected Aircraft
Fokker Model F.28 Mark 0070 series airplanes as listed in Fokker Service Bulletin SBF100-27-071, dated December 21, 1996, 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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