ILS capture sequence

In this example, LOC and GS are captured. Check your own PFD and FMA during each stage of the approach.

Chart data

Frequency, course and altitudes.

Horizontal cue: localizer

Vertical cue: glideslope

Write down the runway, localizer frequency, front course, intercept altitude and missed-approach altitude.

Check tuning

Read the tuned receiver and course. Compare both with the chart. Manually changing either one disconnects FSS Auto Tune.

Check the source

Read the PFD source label. With FMS selected, check that the appropriate LOC1 or LOC2 preview is displayed before using APP.

Set the intercept

Fly the cleared heading and altitude. Check speed and aircraft configuration.

Arm APP

Press APP as described for the setup. FSS says APP has no effect in FMS source without NAV1/2 preview. Look at the FMA for the armed indications.

LOC capture

As the deviation moves toward centre, check for LOC capture. Confirm the aircraft starts tracking the intended path.

GS capture

Check the glideslope deviation and the vertical FMA. Confirm GS becomes active; an armed indication alone is not capture.

Set missed altitude

After GS capture, set the missed-approach altitude as described by FSS. Continue to monitor speed, path and configuration.

Unstable approach

If unstable, fly the missed approach.

If the guidance is unreliable or the aircraft is not stable, discontinue the approach and fly the missed approach. ^[9]