Qantas744ER From United States of America, joined Jun 2005, 1288 posts, RR: 4 Posted (8 years 8 months 3 weeks 5 days 21 hours ago) and read 10307 times:
Hey, when im about 20 miles out and i see my Pink ILS dots, i wait till the pink dot for Glide Slope goes to the center, and then I activate APP but my Hold button stay`s on and my plane doesnt follow the direction and the Glide Slope of the runway? the same goes for the LNAV it doesnt turn off as it should wen i turn on the APP?
Jwenting From Netherlands, joined Apr 2001, 10213 posts, RR: 18
Reply 1, posted (8 years 8 months 3 weeks 5 days 20 hours ago) and read 10303 times:
You're switching to APP mode too late.
ALT HOLD stays on in APP mode until glide slope intercept. As you're only turning on APP after glideslope intercept it never triggers that.
Same likely with LNAV, AFAIK it's triggered by localiser intercept.