McDonnell Douglas Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Confusion; Distraction
Aircraft Equipment Problem Critical
General Maintenance Action
Aircraft
Descending through 3000 ft. on visual approach to ZZZ; at 20 KIAS above the foot; slats and speedbrakes extended. Crew received a transient stick shaker on both yokes for about two seconds. All flight parameters appeared to be well outside the stall envelope.There has been a higher than usual volume of these [stick shakers] on recent flights. They are a distractor during critical phases of flight. Would like to hear some feedback as to what was the cause. Last explanation was a slat rig problem. Aircraft system malfunction.
Reporter stated the slats were out; not transitioning; when the uncommanded stick shakers have occurred. Most of the stick shaker events have happened at low altitudes during arrival descent; some during climbout; but no adverse rolls that would help determine if the left or right wing was an issue. The events are very distracting and frustrating because Maintenance believes the issue involves slat rigging; but the events continue to occur.
A pilot reports experiencing transient stick shaker events on both yokes for about two seconds on a wide bodied Douglas aircraft during low altitude descents with slats and speedbrakes extended.