approach coupler

approach coupler

An electronic linkage between the ILS (instrument landing system), the automatic flight control, and the autopilot.
References in periodicals archive ?
Although the accident report doesn't confirm it, the aircraft was almost certainly equipped with an approach coupler. Yet the pilot appeared to have hand-flown the approach in a way, according to the radar track, that wasn't wildly out of control, but that eventually reached sufficient pitch up and bank to cause a stall.