3 ms·
But don't Southwest planes already have the AoA disagree light, which they bought as an option?
by gok 8y ago
But don't Southwest planes already have the AoA disagree light, which they bought as an option?
- mhandley 8y agoYes. But the AoA disagree indicator did not disable MCAS. In similar circumstances, SouthWest pilots would not have taken off, because AoA disagree would have indicated as soon as they'd begun their takeoff roll. But if an AoA sensor had failed in flight, it would still have been up to the pilots to manually disable stabilizer trim.