Sign in to follow this  
LevelMind

Noise Abatement Procedure

Recommended Posts

I'm wondering how you are meant to know which NADP that should be used for departure. I know that it usually says on the charts, but at an airport such as EKCH it only says:

 

Noise Abatement Procedure

No turns allowed Before:

etc....

 

So should I assume NADP 2 should be used since that seems to be the normal one at which you accelerate and derate at the same time?

Share this post


Link to post
Share on other sites
Help AVSIM continue to serve you!
Please donate today!

Someone else can correct me, but I believe unless it states specific hours that a particular DP should be used, then the noise abatement procedure should be followed all the time. Usually the 'no turns allowed before' is to avoid overflying certain areas such as a residential area. 

Share this post


Link to post
Share on other sites

Ok

 

But which NADP should be used? NADP 1 or NADP 2, since they're quite different i'd be good to know.

Share this post


Link to post
Share on other sites

It really depends on the airline and SOP, but most use NADP2 unless NADP1 is stated on the chart.

Share this post


Link to post
Share on other sites

And also, while we're on this topic. I thought I'd ask if PROC A or PROC B (at which you'd climb with TO thrust up to 1500 feet before Climb thrust) is still used? Or if only the new NADP 1 or NADP 2 (at which you reduce to CLB thrust at 800 feet) is used?

Share this post


Link to post
Share on other sites

PROC A+B are now replaced with NADP's, for example at Easyjet they use NADP2 and 1000ftAGL for both thrust reduction and acceleration altitudes. Keep in mind the 800ftAGL for thrust reduction is just the minimum value allowed in NADP2 but it doesn't have to be that low.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this