Safety recommendation
NTSB Recommends FAA Action on 727 Takeoff Warning System
Federal Aviation Administration urged to issue airworthiness directive for modification of takeoff warning system in Boeing 727 aircraft.
The National Transportation Safety Board recommends that the Federal Aviation Administration issue an airworthiness directive to require modification of the takeoff warning system in the Boeing 727 model airplanes based upon the results of the directed engineering study.
Original regulatory source: https://data.ntsb.gov/carol-main-public/sr-details/A-89-126