AD 96-20-04
Unsafe Condition
The passenger door opened during flight due to an improperly locked door and the door warning signal was not sufficiently visible to alert the flight crew of this condition.
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Required Actions
Modify the passenger door lock warning system within specified timeframes using applicable Fokker Service Bulletins. Operators may use alternative methods of compliance if approved by the FAA.
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Compliance Time
Within 9 months after November 4, 1996 for post-Fokker SB F28/52-72 configuration airplanes, or within 1,500 landings after November 4, 1996 for pre-Fokker SB F28/52-72 configuration airplanes.
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Affected Aircraft
Fokker Model F28 Mark 1000, 2000, 3000, and 4000 series airplanes, all serial numbers.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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