Boeing Aero No.17
Retrofit of the 737-800 commercial airplane includes a load alleviation system to obtain full use of the speed brakes to the in-flight detent position during typical airline operations. The system, which is installed in the flight deck aisle stand, arms at heavy weights and high speeds at extreme portions of the flight envelope. When armed, the system actuates the in-flight speed-brake handles and retracts them to 50 percent.