# 747 8i Data Link ETD ETA

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Hello,

Just a Simple Question in the regarding DataLink ETE [Estimated Time Enroute]

there's a confusion regarding this entry.

is the ETE = Block Time for instance if block time is 50 mins from gate to gate it should be entered in the ETE or it should be added to the departure time

so if ETD= 10:10 and Enroute Time= 50 mins ETE = 00:50 or ETE= 10:10 + 50 = 11:00 ?

thank you

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9 minutes ago, Remys said:

Hello,

Just a Simple Question in the regarding DataLink ETE [Estimated Time Enroute]

there's a confusion regarding this entry.

is the ETE = Block Time for instance if block time is 50 mins from gate to gate it should be entered in the ETE or it should be added to the departure time

so if ETD= 10:10 and Enroute Time= 50 mins ETE = 00:50 or ETE= 10:10 + 50 = 11:00 ?

thank you

ETE is based on total trip time or time in air.  So the time we enter is scheduled block out time and then the trip time.

Example, Scheduled time of Departure (Block out) is 10:10 but the flight time say from SFO and OAK is 15 min, we enter 00:15 in ETE.  That way when the aircraft is airborne it knows to calculate the ETA accurately for ACARS.

Edited by thibodba57
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39 minutes ago, thibodba57 said:

ETE is based on total trip time or time in air.  So the time we enter is scheduled block out time and then the trip time.

Example, Scheduled time of Departure (Block out) is 10:10 but the flight time say from SFO and OAK is 15 min, we enter 00:15 in ETE.  That way when the aircraft is airborne it knows to calculate the ETA accurately for ACARS.

thanks a lot so in my case the ETE should Be 00:50 and not 11:00 correct?

Edited by Remys

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3 minutes ago, Remys said:

thanks a lot so in my case the ETE should Be 00:50 and not 11:00 correct?

Yes because you are only flying for 50min and not 11 hours. Ete is estimated time enroute. Enroute means flying.

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11 minutes ago, Remys said:

thanks a lot so in my case the ETE should Be 00:50 and not 11:00 correct?

If 00:50 is estimated time in the air yes.  If it's the estimated time block to block no.

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5 minutes ago, thibodba57 said:

If 00:50 is estimated time in the air yes.  If it's the estimated time block to block no.

yes totally correct. 00:50 is the block Time (Y)

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17 minutes ago, Remys said:

yes totally correct. 00:50 is the block Time (Y)

The reason Block to Block isn't used is after departure a message is automatically sent via ACARS with an ETA.  So if you used Block to Block and Dispatch added total 45 min of Taxi time and it only took you 10 min there would be a rather large discrepancy.  Assigned parking might not be available or ground handling.  But I'd the air time is used then no matter what time you get in the air whether it's a longer or shorter taxi time accurate information is being sent.

Now that being said. This is the virtual world, big brother is not paying attention to what you enter. It's not going to make a difference 🙂

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2 hours ago, thibodba57 said:

The reason Block to Block isn't used is after departure a message is automatically sent via ACARS with an ETA.  So if you used Block to Block and Dispatch added total 45 min of Taxi time and it only took you 10 min there would be a rather large discrepancy.  Assigned parking might not be available or ground handling.  But I'd the air time is used then no matter what time you get in the air whether it's a longer or shorter taxi time accurate information is being sent.

Now that being said. This is the virtual world, big brother is not paying attention to what you enter. It's not going to make a difference 🙂

yes, I got your point. and you're totally right, but as you know in order to be able to use ACARS you have to enter the ETD and ETE + Airline ICAO [Preflight] so when you're parked at the gate . and Since the ETE is the enroute time and since after departure the message is being sent to ACARS that should be fine.

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Was going to ask the same thing.  Thanks for the answers guys!

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11 hours ago, thibodba57 said:

Now that being said. This is the virtual world, big brother is not paying attention to what you enter. It's not going to make a difference 🙂

It probably will, because you never know who might be watching you via ACARS!

If you are aiming for realisim it's always a good idea to input the correct times into the ACARS unit.- i.e. ETD (Estimated Time of Departure) and ETE (Estimated Time En-route).

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On Another hand and a different topic, what is really weird is that in the EFB whatever the Fuel Qty is and the Weight the Optimum Flaps are always calculated as being 20. whereas in lot of cases it should be 10 any clue about this?

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9 minutes ago, Remys said:

On Another hand and a different topic, what is really weird is that in the EFB whatever the Fuel Qty is and the Weight the Optimum Flaps are always calculated as being 20. whereas in lot of cases it should be 10 any clue about this?

Performance calculations is not fully functional that is why no optimum cal be calculated for thrust or flap setting I believe.

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3 hours ago, Remys said:

On Another hand and a different topic, what is really weird is that in the EFB whatever the Fuel Qty is and the Weight the Optimum Flaps are always calculated as being 20. whereas in lot of cases it should be 10 any clue about this?

I've seen Flap 10 as optimum setting in multiple sessions.

3 hours ago, ph-cxz said:

Performance calculations is not fully functional that is why no optimum cal be calculated for thrust or flap setting I believe.

This is not directly related with ATM or reduced thrust calculations.

Edited by downscc

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3 hours ago, Remys said:

On Another hand and a different topic, what is really weird is that in the EFB whatever the Fuel Qty is and the Weight the Optimum Flaps are always calculated as being 20. whereas in lot of cases it should be 10 any clue about this?

I believe the EFB is still a work in progress.  Certain B744 operators use Flaps20 as their Standard Operating Procedure and for safety reasons will only consider using Flaps10 when there is a definite performance advantage. Accidents have happened in the past where the wrong takeoff flap setting has been used.

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Here we go I shared with you a Link regarding the TOGA [TO], and Flaps Settings maybe someone could help:

The Problem is the Following:
1- the EFB Computed the "TO" , to 98 % the D-To N1 on the FMC is Shown as to Be 90.6% whereas I've Tried everything to set it up to 98% on the FMC. but counldn't  Override the D-To N1 . so whenever to TOGA is activated on the runway during takeoff the Engines  N1 Go to 90.6%. is there a way to be able to Override the ToGA Value on the FMC as desired and as computed by the EFB? . 2- the aircraft has only 11.1% of Fuel and low payload the EFB is Setting the Optimum flaps to 20 , whereas in this case it should be 10 MAx any clue also about this ?
thank you

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9 minutes ago, Remys said:

Here we go I shared with you a Link regarding the TOGA [TO], and Flaps Settings maybe someone could help:

The Problem is the Following:
1- the EFB Computed the "TO" , to 98 % the D-To N1 on the FMC is Shown as to Be 90.6% whereas I've Tried everything to set it up to 98% on the FMC. but counldn't  Override the D-To N1 . so whenever to TOGA is activated on the runway during takeoff the Engines  N1 Go to 90.6%. is there a way to be able to Override the ToGA Value on the FMC as desired and as computed by the EFB? . 2- the aircraft has only 11.1% of Fuel and low payload the EFB is Setting the Optimum flaps to 20 , whereas in this case it should be 10 MAx any clue also about this ?
thank you

You selected 98c for the assumed temperature. A lower assumed temperature closer to your outside air temperature will give a higher thrust setting for n1. Leaving it blank will give the max toga value.

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1 hour ago, ph-cxz said:

You selected 98c for the assumed temperature. A lower assumed temperature closer to your outside air temperature will give a higher thrust setting for n1. Leaving it blank will give the max toga value.

yeah, but what if I need to set it up manually to be 98 %?  and if I enter the Temperature as entered on the EFB in my case 12 C would it give me the same Thrust I mean the 98%, and if not is there a way to enter manually the Thrust? or this value cannot be overridden in the FMC?
on another hand, the question related to OPTIMUM Flaps on the EFB: it's always 20 whereas as mentioned before the Fuel amount is only 11% and low payload. it shoud';ve been 10. I dunno why the EFB is alway Giving me 20 as Optimum Flaps in All my Flights thank you

Edited by Remys

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24 minutes ago, Remys said:

yeah, but what if I need to set it up manually to be 98 %?  and if I enter the Temperature as entered on the EFB in my case 12 C would it give me the same Thrust I mean the 98%, and if not is there a way to enter manually the Thrust? or this value cannot be overridden in the FMC?
on another hand, the question related to OPTIMUM Flaps on the EFB: it's always 20 whereas as mentioned before the Fuel amount is only 11% and low payload. it shoud';ve been 10. I dunno why the EFB is alway Giving me 20 as Optimum Flaps in All my Flights thank you

You can’t override the thrust setting it self. You can only select which derate and the assumed outside temperature. The efb is still work is process regarding optimum thrust and atm. This likely relates very close to the optimum flap setting.

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4 hours ago, ph-cxz said:

You can’t override the thrust setting it self. You can only select which derate and the assumed outside temperature. The efb is still work is process regarding optimum thrust and atm. This likely relates very close to the optimum flap setting.

Thanks a lot. really appreciated 🙂

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