Safety recommendation
NTSB Recommends FAA Study of 727 Takeoff Warning System
The National Transportation Safety Board has issued a recommendation for a directed engineering study of the takeoff warning system in Boeing 727 aircraft.
The NTSB recommends that the Federal Aviation Administration perform a directed engineering study of the takeoff warning systems in the Boeing 727 model airplanes, with special emphasis on the takeoff warning system throttle switch installation. The study should evaluate the reliability, maintainability, and methods to improve the design of the system.
Original regulatory source: https://data.ntsb.gov/carol-main-public/sr-details/A-89-125