Napd1 and napd2

[Pin Head]

Are these the two only recognised departures or is their a default third?

I thought the norm was always to fly an Napd2 unless you are at a noise sensitive airport and hence fly the other.

Kind regards

Pin

[flapsupdown]

I believe these two are the only ones usable when flying a SID

The procedure differs depending on operator/fleet and/or airport in question

[wanabee777]

Here's some info published by ICAO:

http://www.icao.int/environmental-protection/Documents/ReviewNADRD.pdf

[de facto]

Waow..do you have any company manuals?
Some airports still use ICAO A or B.
Oh my, i used Icao A yesterday,and yes it was while flying an SID.

[Wizofoz]

Plus there can be state variations- Germany is a blanket 1500/1500 unless otherwise stated.

[de facto]

Indeed,but that would mean one would have to actually prepare for his flight and open manuals provided:p
My fleet fmc default thrust "reduction" is 1500ft but sops require otherwise if no specific requirements at airports.

[wanabee777]

See also:

Procedures for Air Navigation Services — Aircraft Operations (PANS OPS) Volume I - Flight Procedures (Doc 8168), Part I, Section 7.

[TeabagRA]

Just FYI it's NADP, not NAPD

[FlightDetent]

Is it true that BA do 1000/1000 irrespective of the AIP says?

de facto: sounds like the case when pin-reprogramming would be the the sensible step forward.

[JammedStab]

A few years back, our particular airline had a particular type that had a particular noise abatement procedure used that was different from NADP1 or 2 when departing from a particular runway at a particular airport:confused:.

It was approved by the airport authority and had a different thrust reduction and flap operation height based on a DME distance. The strange thing was, when I happened to be talking to a tower controller at that airport, he was completely unaware of this procedure.

[Chesty Morgan]

FD, the Embraer 170-195 was so quiet that a standard take off was considered noise abatement regardless of local airport procedures.

Perhaps that's where your 1000/1000 comes from.

[FlyingStone]

Surely (for airports which have NADP in combination with noise monitoring) it doesn't matter which NADP the airline uses as long as noise levels are below limit, or they are willing to fork out some cash for fines?

[de facto]

de facto: sounds like the case when pin-reprogramming would be the the sensible step forward.
FlightDetent is online now Report Post
No ****,good idea,will save daily finger aches.

[despegue]

Regarding Germany,
They request but do not demand a 1500' thrust reduction and acceleration in their AIP.

Also, Altitude/ performance limitations always take priority over which noise abatement to fly.

[RandomPerson8008]

At my company, which flies all over the planet in several varieties of Boeing widebodies, NADP-2 is supposed to be the standard operating procedure unless the Introduction/Departure Section of the Jepessen charts, the NOTAM(P)'s, etc dictate otherwise. Previously NADP-1 was standard (except for the US where NADP-2 was always supposed to be), however NADP-2 is now favored for fuel savings.

There are some places where these must be modified to comply with Single Engine Terrain Clearance requirements (acceleration height non standPrd for the twins), or to comply with RNAV departure procedure turning radius requirments (delayed acceleration as high as 5000 feet AGL in some cases). These procedures are usually detailed in airport & company specific charts or notam's if applicable, however they are not to be applied at other airports unless required, as far as I know.

I'm not saying what we do is correct in all cases if one were to consult the local regulatory agencies, but it's consistent enough to work (except when it doesn't). I am interested in hearing what other operators do as SOP though.

[piratepete]

NADP 1: constant speed, typically around V2 plus 10 or so, to 3000 AFE with thrust reduction at a recommended height, like say 800-1500 feet, then accelerate/clean up at said 3000 AFE.

NAPD 2: constant speed typically around V2 plus 10 or so, to a stated height, something like 800-1500 feet AFE then thrust reduction/acceleration/clean up followed by climb at minimum clean speed to 3000 AFE, followed by normal climb schedule speeds.

NAPD 3: Who gives a FCUK, its a quiet machine, no need to do anything abnormal.