What was found
AIRCRAFT WAS GROUNDED: DURING FLIGHT AT CRUISE AT FL 210 USING ALL AUTOMATION CONTROL, WHILE REDUCING SPEED THE AUTO THROTTLE REDUCES THE POWER THEN THE GEAR HORN GOES OFF AND THE 3 GEAR RED LIGHTS COME ON. (OPEN).
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS GROUNDED: DURING FLIGHT AT CRUISE AT FL 210 USING ALL AUTOMATION CONTROL, WHILE REDUCING SPEED THE AUTO THROTTLE REDUCES THE POWER THEN THE GEAR HORN GOES OFF AND THE 3 GEAR RED LIGHTS COME ON. (OPEN).