As the title say how do you input ETP'S for E.T.O.P.S operations in the Boeing FMC?

 

 

 

    Thanks,

      Joseph

They're computed by dispatch and given to the crew in the ETOPS section of the OFP. It's just a coordinate, example: N54W105 - which you enter into the FIX page. 

 

I saw a friends photo who flies the 737NG and they actually used custom waypoints I think it was named 'ETP1 & 2'. 

They're computed by dispatch and given to the crew in the ETOPS section of the OFP. It's just a coordinate, example: N54W105 - which you enter into the FIX page. 

 

I saw a friends photo who flies the 737NG and they actually used custom waypoints I think it was named 'ETP1 & 2'. 

 knew it was on the OFP but did not know how to input it thanks.

I knew it was on the OFP but did not know how to input it thanks for your help.

I believe the 777 FMC is able to work this out for you. I have seen something like it on a YouTube video. I mentioned it In another thread about the 777 tutorial when it's released, but know one from PMDG confirmed if I was correct or it will be modelled.

I believe the 777 FMC is able to work this out for you. 

 

Where did you see this? After reading the manuals a few times, I've seen no mention. There's so many variables that can change where the ETP is.

 

I knew it was on the OFP but did not know how to input it thanks for your help.

 

Just took this over the North Atlantic: 

 

 

Will I be able to enter way points the shorthand method such as 5340N, or 5520N?

Where did you see this? After reading the manuals a few times, I've seen no mention. There's so many variables that can change where the ETP is.

 

 

Just took this over the North Atlantic: 

 

Untitled-1.png

How do you calculate ETP's do you just take distances in between your alternate airfields since PFPX is not out or what?

 

 

How do you calculate ETP's do you just take distances in between your alternate airfields since PFPX is not out or what?

 

I would say flying time as opposed to distance, taking into account winds etc. IIRC, you should also calculate the route and ETOPS alternates according to one engine flying time at 10000' to account for the worst case scenario of an engine failure and cabin depresurisation.

How do you calculate ETP's do you just take distances in between your alternate airfields since PFPX is not out or what?

 

Honestly? It's really a guess with some thought put into it. Basically what I did was choose my two ETOPS alternates tonight - one being Torbay (YYT) and other Shannon (SNN). After that I got the distance between the two then looked at the winds - I then found I would get to Shannon quicker before the halfway mark than returning to YYT due to strong tailwinds. Therefore I got out my chart and made a total guess of where looked right. Far from realistic, but the only way I can do it for now! Sorry if that wasn't as useful ha.

 

 

Honestly? It's really a guess with some thought put into it. Basically what I did was choose my two ETOPS alternates tonight - one being Torbay (YYT) and other Shannon (SNN). After that I got the distance between the two then looked at the winds - I then found I would get to Shannon quicker before the halfway mark than returning to YYT due to strong tailwinds. Therefore I got out my chart and made a total guess of where looked right. Far from realistic, but the only way I can do it for now! Sorry if that wasn't as useful ha.

 

image.jpg

Ah ok thanks for the help.

I think the formula is (as I can't check right now):

 

Distance A-B * GS B-A / (GS A-B + GA B-A)

 

Not sure on how to convert to a FIX. Hope this helps too.

Where did you see this? After reading the manuals a few times, I've seen no mention. There's so many variables that can change where the ETP is.

 

 

 

Just took this over the North Atlantic:

 

Untitled-1.png

 

Appologies. I was mistaken about the 777 FMC being able to to calculate equal time points. The video I was referring too was in fact taken on the Airbus A330.

 

The video/ DVD is the ITVV Airours A330-200 Manchester to Orlando Sanford.

Will I be able to enter way points the shorthand method such as 5340N, or 5520N?

Yes.

This is for 737NG

< CRITICAL POINT (ETP)
The Critical Point is the point on the intended route where the one engine
inoperative diversion time at FL100 from the two depicted alternates is
equal. It is not necessary for the Critical Point to always fall within the
overlap of the AOA circles. A strong enroute wind may effect the Critical
Point placement.
= TIME FROM DEP
The total elapsed time from departure to the Critical Point.
> FUEL BURN
The fuel burn from departure to the Critical Point.
F/R OVER ETP
Fuel remaining at the Critical Point. This figure may be compared with the
TOTAL FUEL REQUIRED in the CRITICAL FUEL CALCULATION
Section.
@ TIME FROM ETP TO ALTERNATES
Time based on the Single Engine Diversion speed at FL 100.
A CRUISE DISTANCE/PLUS 20 NM
The most direct distance from the Critical Point to ETOPS Enroute
Alternates plus 20 miles for ATC and/or unplanned contingencies.
B CRITICAL FUEL CALCULATION
The following calculations are based on forecast wind conditions and
include both the engine failure scenario and the decompression scenario at
the most critical point from the suitable ETOPS Enroute Alternate Airport.
C 2ENG
Decompression scenario meaning immediate descent from cruising altitude
to FL 100, then diversion to suitable airport on two engines.
D 1ENG
Engine shutdown and windmilling at the most critical point, plus driftdown
to FL 100, then diversion to a suitable airport at the approved single engine
speed.
CRUISE / FL100
Both loss of an engine and the decompression scenarios are provided
including diversion to either suitable airport based on forecast winds. The
time shown is the most conservative and not governing since it is based on
forecast winds, not still air. The descent to 1500 feet is also included in this
segment.
HOLDING/1500FT
Holding calculation over the suitable airport at 1500 feet for 15 minutes.
MISSED APPCH
Fixed fuel amount for approach, missed approach and subsequent approach
and landing.
APU/ 235 LBS/HR
APU fuel calculation based on 235 pounds per hour including cruise,
descent and 15 minutes holding over the suitable airport plus approach,
missed approach, subsequent approach and landing.
AI + ICE DRAG
AI + Ice Drag fuel is an additional fuel requirement that accounts for
Engine and Wing Anti-ice plus the accumulation of ice on unheated
surfaces. This value is only computed when icing is forecast at FL100.
Otherwise, AI +Ice Drag fuel will be given a zero fuel value.
ANTI-ICE
The additive fuel value for use of anti-ice systems (engine and wing) is
always applied even if there is no icing forecast.
In the case where AI + Ice Drag fuel is zero (no icing forecast), the Anti-Ice
fuel penalty will be shown on the Anti-Ice line. If icing is forecast, this
penalty will be combined with the ice drag penalty and shown on the
AI + Ice Drag line. The Anti-Ice penalty is based on the total time required
for cruise, descent and 15 minutes holding plus the approach, missed
approach, and subsequent approach and landing.
ADDL 5 PCT RES
An additional 5% of cruise fuel is required for wind forecasting errors.
TOTAL FUEL REQD
The sum of the above - reflecting the most conservative of the various
calculations including forecast wind.

 

 

http://mbev.net/wikka/OceanicETOPS

 

 

 

 

http://worldairops.com/NAT/

Hi.

 

Below is the part of RW flight plan. I asked 777 pilots flying oceanic today and they said this: “We put them in RT2 page with a discontinuity between each point. Gives a blue line on the MFD when you select RT2”. SO enter C-EEP N52 15.6 W044 19.6 - this is ETOPS entry point, than enter ETOPS ETP - N53 05.7 W033 23.3 - this is Equal Time point, and at the end enter C-EXP N52 01.5 W018 07.5 - ETOPS exit point. All these points will be just as fixes along the route.

EARLIEST/LATEST ARRIVAL TIME FOR THE ETOPS ALTERNATE AIRPORTS
             BASED ON ETD
CYQX SUITABLE 0434Z/0825Z
EIDW SUITABLE 0615Z/0822Z
 
C-EEP N52 15.6 W044 19.6  TIME 02.54  FUEL 0258  FRMG 0384
 
C-EXP N52 01.5 W018 07.5  TIME 04.44  FUEL 0389  FRMG 0253

ETOPS ENTRY AIRPORT CYQX
ETOPS EXIT  AIRPORT EIDW
 
SUITABLE ALTERNATES          - CYQX / -EIDW
ETOPS ETP     - N53 05.7 W033 23.3
TIME FROM DEP - 03.40
FUEL BURN     - 0314
F/R OVER CP   - 0328
TIME FROM CP  TO ALTERNATES/ 02.05  BASED ON SINGLE ENG ETOPS DESCENT
FL 100
 

Manually Entered Latitude / Longitude Waypoint Names:

N47° W008° is entered as N47W008 and displayed as WPT01.
N47° 15.4’ W008° 3.4’ is entered as N4715.4W00803.4 and displayed as WPT02