The stabilizer trim system is also controlled manually by large black wheels in the cockpit that the pilots can twirl around to adjust trim.

Black box data from the Lion Air jet that crashed in October reveals the pilots struggled to fight the plane's malfunctioning safety system from takeoff to the moment it nose-dived into the Java ...

Much like tapping the brake pedal in a car to disengage cruise control, a sharp tug on the controls of older models of Boeing Co’s 737 used to shut off an automatic trim system that keeps the ...

Embraer Defense and Security has chosen Sagem’s actuator system for the horizontal stabilizer trim system (HSTS) on its KC-390 military transport and tanker aircraft. The first flight of the KC ...

Since the second 737 Max crash, in March in Ethiopia, Boeing has defended the runaway stabilizer trim procedure as sufficient. The two crashes killed 346 people.

The trim switches interrupt the MCAS for 5 seconds and establish a new stabilizer trim reference point, but as described in the previous paragraph, does not de-power the MCAS and the speed-trim ...

While MCAS became widely known for its role on the 737 MAX, the system had already appeared on another Boeing aircraft before the MAX entered commercial service.

Unable to crank the trim wheel, the ET302 crew toggled the stabilizer motor back on, which enabled the MCAS—still acting on faulty AOA data—to activate again.

Boeing is working to fix yet another software bug on its 737 Max, Bloomberg reports. The glitch involves an indicator light for the "stabilizer trim system," which helps raise and lower the plane ...

Moving a 737 Classic horizontal stabilizer one degree, or unit, required about 10 turns of the trim wheel. On newer 737s, including the MAX, moving the stabilizer the same amount requires about 15 ...

Ethiopian Air pilots turned off 737 MAX anti-stall system. Then it turned on again Pilot properly switched off stabilizer control system but could not regain control; software may have rebooted.

The recorders for Ethiopian Airlines Flight 302 are visibly damaged, but CVRs and FDRs are designed to withstand fire, impact shock, crushing, immersion in water, and penetration from other objects.