Discontinue

Question 1

Why is pressing TOGA for a discontinue not considered to be the best course of action and may not give the desired results?

Answer 1

Generally, it commands TOGA thrust, accelerates the airplane to VREF + 20 kt, and sequences the missed approach procedure in the FMS (if the TOGA button is pressed too early, it does not sequence the FMS).

Question 2

What’s the general flow for the discontinue procedure

Answer 2

The flow begins by terminating the approach (APP), moves from left to right across the guidance panel (lateral mode, airspeed, vertical mode), sequences the FMS, and finally configures the aircraft.

Question 3

To discontinue an approach without pressing the TOGA button, use the callout “DISCONTINUE” and perform the following actions:

Answer 3

1. Deselect APP, if armed. Verify/select desired lateral mode displayed on the FMA.
2. Set appropriate airspeed.
3. Set appropriate altitude and select FLCH.
4. Sequence the missed approach using the MISSED APPR prompt on FMS FLT PLAN page.
5. Select go-around flaps.
6. Select gear up.
7. Call, “CLIMB SEQUENCE, AFTER TAKEOFF CHECKLIST.”

Question 4

Max flap speeds:

Answer 4

230, 215, 200, 180, 165 respectively.