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Search: Posts Made By: ElNull
Showing results 1 to 35 of 110
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Forum: Tech Log
31st Mar 2024, 05:35
Replies: 9
Views: 1,514
Posted By ElNull

Thanks for the response! However I still have 2...

Thanks for the response! However I still have 2 questions:

1) I understood that extending the landing gear early in approach contribute to brake cooling, but from what I understood from your reply...
Forum: Tech Log
30th Mar 2024, 17:07
Replies: 9
Views: 1,514
Posted By ElNull

Fursty Ferret...

Fursty Ferret (https://www.pprune.org/members/370749-fursty-ferret) True, but this doesn't answer my question.
Forum: Tech Log
30th Mar 2024, 13:17
Replies: 9
Views: 1,514
Posted By ElNull

Boeing's Recommended Brake Cooling Schedule

The schedules have Inflight Gear Down Cooling. I've always thought that this part was solely for after-takeoff gear cooling. However, the FCTM states: which lead to the confusion.

The only...
Forum: Tech Log
30th Jan 2024, 21:38
Replies: 9
Views: 2,017
Posted By ElNull

Now I'm curious about where the FMC commands the...

Now I'm curious about where the FMC commands the speed to go. For example, if I select flaps 1 and the speed window is closed, what will be the target speed if it's not the flap 1 speed?
Forum: Tech Log
28th Jan 2024, 17:14
Replies: 9
Views: 2,017
Posted By ElNull

777/787 VNAV approach

Any idea why Boeing require using VNAV with speed intervention active (ie the speed window open) during the final approach. And

2) why they don't recommend adding extra speed constraints to the...
Forum: Tech Log
16th May 2023, 03:20
Replies: 5
Views: 1,626
Posted By ElNull

Jeppesen FLITEDECK PRO X & the new iPad Pro 11inch

I wonder if Jeppesen FLITEDECK PRO X app will work with the new iPad Pro 11 inch. Any ideas?
Forum: Tech Log
2nd May 2023, 12:11
Replies: 4
Views: 1,551
Posted By ElNull

I hope you're kidding.

I hope you're kidding.
Forum: Tech Log
30th Apr 2023, 20:33
Replies: 4
Views: 1,551
Posted By ElNull

Broadband switch during deicing/anti-icing

The 787 FCOM states:

If de-icing / anti-icing is needed: BROADBAND COMM switch ...................................... Off.

Why?
Forum: Tech Log
3rd Jun 2022, 20:53
Replies: 8
Views: 5,129
Posted By ElNull

I am looking for Alps escape route (in case of...

I am looking for Alps escape route (in case of Emergency descend). Can’t find it in Jeppesn. Any help?
Forum: Tech Log
6th Apr 2022, 17:38
Replies: 1
Views: 2,574
Posted By ElNull

fuel jettison limit weight

Any ideas what is fuel jettison limit weight? Is it a limited takeoff weight that assume that we have to dump fuel so we can attain the approach climb limited weight if we're returning to the...
Forum: Tech Log
10th Mar 2022, 09:13
Replies: 5
Views: 2,996
Posted By ElNull

Well, but as I understand there is a "Column...

Well, but as I understand there is a "Column cutout" feature that would disable the stabilizer if it senses a failed or jammed trim switches (either from the primary or alternate trim switches). So,...
Forum: Tech Log
10th Mar 2022, 03:01
Replies: 5
Views: 2,996
Posted By ElNull

787 Alternate pitch trim

As I understand we use the Alternate pitch trim during "a complete loss of flight control signaling", however, I don't see any checklist that direct us to use Alternate pitch trim. Any idea under...
Forum: Tech Log
19th Nov 2021, 20:30
Replies: 10
Views: 4,971
Posted By ElNull

Thanks for all the responses

Thanks for all the responses
Forum: Tech Log
18th Nov 2021, 13:34
Replies: 10
Views: 4,971
Posted By ElNull

Engine limitations during tail/cross winds

Why jet engines have limitation for ground operation in tailwinds and crosswinds? For example, the 777 engines (General Electric Model) should be limited to 75% N1 between 30 knots and 45 knots...
Forum: Tech Log
23rd Sep 2021, 22:25
Replies: 15
Views: 3,610
Posted By ElNull

That make sense, but wouldn't that contradicts...

That make sense, but wouldn't that contradicts what has been said in this thread regarding that the CACs uses energy from the engines and increase fuel burn?
Forum: Tech Log
17th Sep 2021, 21:22
Replies: 15
Views: 3,610
Posted By ElNull

Thanks. I thought it has to do with the engine's...

Thanks. I thought it has to do with the engine's variable frequency generators, i.e. CAC's would demand a higher frequency (which will lead to higher engine RPM?) i.e. more fuel burn.
Forum: Tech Log
16th Sep 2021, 09:05
Replies: 15
Views: 3,610
Posted By ElNull

787 air condition/fuel burn

I'm aware that the 787 doesn't use engine bleed air for air conditioning, instead, they use electrical CACs (Cabin Air Compressors) to supply air to the packs. My question however is, does the...
Forum: Tech Log
6th Sep 2021, 15:17
Replies: 8
Views: 5,938
Posted By ElNull

Thanks, but how would the spoilers reduce the...

Thanks, but how would the spoilers reduce the rate of descent?
Forum: Tech Log
6th Sep 2021, 14:51
Replies: 8
Views: 5,938
Posted By ElNull

787 Flare

Any ideas why the Spoilers bias up during 787 Autoland?

From the FCOM:

Flare

Below 350 feet radio altitude, the inboard spoilers are biased up incrementally. If the autopilot is subsequently...
Forum: Medical & Health
13th Nov 2020, 16:08
Replies: 21
Views: 8,712
Posted By ElNull

Thanks for your answer. It is indeed more...

Thanks for your answer. It is indeed more sensible to discuss white cost syndrome with AME but it is definitely not effective and wont be of much help in my case. Again, it is not an easy thing to...
Forum: Medical & Health
13th Nov 2020, 04:49
Replies: 21
Views: 8,712
Posted By ElNull

I’m not going to take propranolol regularly. I...

I’m not going to take propranolol regularly. I only want to take it only once before my AME for my anxiety which I cannot control.
Forum: Medical & Health
12th Nov 2020, 22:53
Replies: 21
Views: 8,712
Posted By ElNull

Hello! Thanks for your reply! Why you were...

Hello! Thanks for your reply! Why you were grounded though?
Forum: Medical & Health
12th Nov 2020, 13:17
Replies: 21
Views: 8,712
Posted By ElNull

I have the similiar situation and was thinking...

I have the similiar situation and was thinking about taking propranolol/inderal to calm me down before my AME, I become very anxious when it is my turn for the cardiology exam and concequently my...
Forum: Tech Log
12th Apr 2020, 19:38
Replies: 50
Views: 17,450
Posted By ElNull

My question here was not how an IRS do alignment....

My question here was not how an IRS do alignment. My question was that why not an IRS just take all the position from the GPS rather than taking time sensing and calculating.
Forum: Tech Log
11th Apr 2020, 21:44
Replies: 50
Views: 17,450
Posted By ElNull

totally agree.. thats what I always thought!

totally agree.. thats what I always thought!
Forum: Tech Log
11th Apr 2020, 21:37
Replies: 50
Views: 17,450
Posted By ElNull

what do you mean by IRS will compensate and keep...

what do you mean by IRS will compensate and keep the headings?
Forum: Tech Log
11th Apr 2020, 17:27
Replies: 50
Views: 17,450
Posted By ElNull

That makes sense! So the IRS just compares both...

That makes sense! So the IRS just compares both latitudes, and if both matches, it will then take/add GPS longitude to it. That explains it, thank you!
Forum: Tech Log
11th Apr 2020, 16:18
Replies: 50
Views: 17,450
Posted By ElNull

this might be dumb question but at ground why the...

this might be dumb question but at ground why the IRS would need to sense the earth rotation when it already have position from the GPS? Or is it just need it for a comparison?
Forum: Tech Log
11th Apr 2020, 15:41
Replies: 50
Views: 17,450
Posted By ElNull

IRS Alignment

Why the IRS cant be realigned in flight? I know the aircraft need not to be in motion during alignment. But if the IRS loses it’s position, why it stays like that for the reminder of light. Why cant...
Forum: Tech Log
10th Apr 2020, 03:09
Replies: 5
Views: 1,385
Posted By ElNull

Thanks for the quick answer!

Thanks for the quick answer!
Forum: Tech Log
10th Apr 2020, 01:28
Replies: 5
Views: 1,385
Posted By ElNull

RNAV

I have a couple of questions that might look dumb. I know the A/C get it’s position from GPS,IRS,RADIO and FMS. Does the FMC generates the LNAV route/airway based on it’s position calculation?

...
Forum: Tech Log
19th Mar 2020, 21:58
Replies: 4
Views: 1,363
Posted By ElNull

Gotcha thank you so much guys

Gotcha thank you so much guys
Forum: Tech Log
18th Mar 2020, 15:19
Replies: 4
Views: 1,363
Posted By ElNull

Crew oxygen

I have 2 questions regarding crew oxygen:

Since during a preflight we put Normal/100% switch to 100%. Under what circumstances we use the Normal (air-oxygen mixture)?

also the Emergency...
Forum: Tech Log
12th Mar 2020, 17:41
Replies: 10
Views: 4,870
Posted By ElNull

Aircraft refueling from left wing

Any ideas why boeing made the fueling panel on the 787 on the left wing? This where passengers usually boards and that and might impose some risks to them.
Forum: Tech Log
26th Feb 2018, 14:08
Replies: 22
Views: 7,456
Posted By ElNull

Sky job: There are some other Operators that have...

Sky job: There are some other Operators that have this option yet their OM says to use VORLOC mode first then APP Mode which contradicts what you say. I hight doubt this option is a customer option...
Showing results 1 to 35 of 110
 
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