Questions tagged [boeing-777]

A long-range wide-body twinjet airliner produced by Boeing since 1993, with over 1,500 built.

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Can someone tell me what is this on the overhead panel of the Boeing 777?

I found this on the Boeing 777 and it was on the Captain's side behind the speaker.
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What is the green arrow on the 777's airspeed tape? Does it exist on other types as well?

Image source: fsnews.eu I found this green arrow on the primary flight display (PFD) of a 777. What does it show? I'm assuming it's for showing acceleration and deceleration but I am not too sure. Is ...
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6 votes
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Why are spoiler panels 5 and 10 locked in high speed flight on the B777?

From the Boeing 777 FCOM: Spoiler panels are used as speedbrakes to increase drag and reduce lift, both in flight and on the ground. The spoilers also supplement roll control in response to control ...
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7 votes
3 answers
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What are the Boeing 777 aural alerts indicating in this ATC recording?

There was a recent incident (avherald.com) with an Air France Boeing 777 on approach to CDG where several different aural warnings can be heard in the ATC audio recording (YouTube) when the pilot has ...
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Delays between "50", "40", "30", "20", and "10" cockpit announcements

When a large airplane is about to land, the following announcements are heard in the cockpit: "Fifty!" (delay) "Forty!" (delay) "Thirty!" (delay) "Twenty!" (...
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10 votes
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What is that green rectangle next to altitude readout on Boeing aircraft?

Does anyone know what this green rectangle represents? It's from a Boeing 777 PFD. I can't find answers anywhere.
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Can an airliner with no brakes be slowed down after landing by steering it into the grass?

If pilots have no control over brakes / air brakes / reversers, can they slow down the plane after landing by carefully steering it off the runway into the grass? Would it be better to put only one ...
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9 votes
3 answers
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What happens if the autopilot fails to initiate a flare?

What are the chances of autopilot failing to do a flare in an otherwise stable autopilot controlled approach and landing? Has it happened before and how was it dealt with?
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2 votes
4 answers
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Airliner failing to execute flare during landing [duplicate]

If an airplane such as Boeing-777 doesn't do a flare and instead continues "50, 40, 30, 20, 10..." at a steady rate, how hard will it hit the ground? (Added later) Specifically, will it be a ...
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14 votes
1 answer
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What are the two vents on the 777's left side behind the wing for?

— wikimedia.org; cropped Those have always caught my eye and I always dismissed them as equipment cooling vents. But, after finally remembering to check the flight manual, it turns out the equipment ...
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19 votes
1 answer
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Why is the 777 fuel burn rate graph U shaped and skewed to the left?

I don't know math or physics. If I misuse terms, just edit my post, thanks! Presuppose a normal uneventful flight, such that as the plane climbs and cruises, the pilot reduces engine thrust to 69%-...
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4 votes
0 answers
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Does a B777 have a control priority button?

There have been accidents where one pilot gets confused, panics, inappropriately pulls or pushes the control column, and the other pilot does not manage to get control from them and the aircraft ...
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How can I know the manufacturer of the PFD (Primary Flight Display) of the current mainstream passenger aircraft?

I'm developing a computer vision software based on the photos of these PFD (Primary Flight Display). How can I know the manufacturer of these PFD of the current mainstream passenger aircraft: B737. ...
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2 votes
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Why Not Just Replace All the Fan Blades?

It looks like operators will have to remove all their P&W powered B777s from service until they have checked the engines. Since the problem seems to be fatigue (which is a function of time) in a ...
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Why are jet engine fan blades painted?

I came across this extremely interesting article with details on a 2018 United Airlines Boeing 777 engine failure, which is also related to the more widely-publicized failure a few days ago: http://...
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How heavy are the folding wingtips of 777x?

To understand the mass penalty that is induced by a folding wingtips, as a first order approximation we can start with just the wingtip's mass without the actuating mechanism. I could not find the ...
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3 votes
1 answer
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What protections and feedback does the fly-by-wire of the Boeing 777/787 provide?

I know the Boeing 777 and 787 run on Fly-By-Wire. I was wondering: Do they have the Alpha Floor or Flight Envelope protections Airbus aircraft have? Do they have force feedback/force feel? The 737, ...
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1 vote
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Does ELMS inhibit cabin pressure alarms on the 777, and would the MEC Override Vent be stuck open following an electrical failure?

I found this article rather interesting, but like most things on the internet, they can be wrong. I couldn't think of a better site to address this question. This user says: when ELMS takes over ...
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13 votes
2 answers
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Why are longer wings with foldable wingtips used on the B777X instead of lighter ones with original size?

The new Boeing 777X has longer wings to improve efficiency, but has to adopt foldable wingtips to "fit" into all original airports that host its predecessor. Tendentially, longer wings would ...
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How much pressure do boost and jettison fuel pumps produce?

What is the pressure output of a (boost) fuel pump on a Boeing 767 and/or 777, compared to a heavy-duty jettison fuel pump.
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5 votes
1 answer
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Why will the 777X be tested for crosswind handling with wingtips raised?

Wikipedia says: As existing regulations do not cover the folding wingtips, the FAA issued special conditions, including proving their load-carrying limits, demonstrating their handling qualities in a ...
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Is the 777X actually the newest Boeing plane?

I don't think the 777X is actually the newest Boeing plane (in april 2020), since it's only a new variant of a previous Boeing plane. So the actual newest plane would belong to the 787, since it's the ...
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What is the GE90-115b turbine power output in horsepower?

The GE90-115b is rated at 513 kN maximum thrust and is often said to have 110,000 shaft horsepower, but I have yet to find any document or specification that backs the claim on horsepower figure. A ...
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Why is TO/GA button disabled in 777 with weight on wheels or below 2 ft RA?

Recently a final report for accident of an Emirates B777-300 at Dubai on 3rd August 2016 was published. An important factor there was that when the pilot tried to recover from long landing by going ...
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Is the Boeing 777X being certified as a derivative of the 777 Classic?

Given the corner cutting Boeing did with the Max certification, is the FAA allowing the 777X to be certified as a derivative (easier) of the 777 Classic or requiring a new Type Certificate? (harder) ...
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Why did the 777-9 leave landing gear down during first flight? [duplicate]

In Sam Chui's video covering the first 777-9 flight, there's a shot of the plane over the clouds with landing gear still down. I thought maybe the shot was from another flight. I couldn't find ...
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Is it easy for a Boeing 747 pilot to get a second typerating on the 777? [duplicate]

Is this easy and responsible? Since the 747 and 777 have a glass cockpit, you would think this would be easy.
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7 votes
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Why was the A340 developed with four engines?

The predecessor to the A340 program begun in 1982, when Airbus released the first specification of the designated TA9 and TA11 programmes and in 1986 the TA9/TA11 programmes were officially launched ...
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15 votes
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Why does the Boeing 777X have a flight deck similar to the 787 and not to the previous 777?

Almost 3 years ago I posted this question, Why didn't the A330neo and A320neo share the cockpit of the A350?, and short answers were: "it's what the market wanted" "there is a huge ...
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How did the Boeing 777X's main landing gear lift before the nose on its first takeoff?

Source: Boeing 777X Takeoff for its First Flight Is this from a low payload and the configuration of flaps? Or perhaps a pilot pushing the yoke forward while the plane wants to lift?
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Does anyone have photos of internal parts of ELAC, FAC, SEC or Boeing 777 flight computers?

I'm an electrical engineer and I'm interested in civil aviation, more specifically in fly-by-wire planes like the Airbus A320, Boeing 777 and others. But I fell in love with the Airbus A320 as it is ...
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1 vote
3 answers
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Can an airline order a 777 with 787 flight deck avionics?

So an airline orders a 777, but instead of the cockpit in that, they request the 787 cockpit installed in their 777, is this even doable?
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6 votes
1 answer
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What changes were made to the 777 as a result of British Airways 38?

Regarding the crash of British Airways Flight 38, a 777 inbound to Heathrow, the AAIB final report, section 2.8 states that frozen fuel deprived the engines of fuel pressure resulting in the crash. ...
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Why didn't Philippine Airlines Flight 113 dump fuel prior to forced landing?

Philippine Airlines Flight 113 operated by a Boeing 777 bound for Manila suffered a compressor stall and engine fire. I wonder why the pilot didn't dump fuel from the left-side prior to the landing ...
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4 votes
1 answer
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Engine options for the 777-300ER: GE90-110B1 or -115B?

The Wikipedia page on the Boeing 777 says that the 777-300ER can have either the GE90-110B1 or the GE90-115B, however it was my understanding that the 777-300ER does not have engine options and is ...
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1 vote
1 answer
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How can the 777X's longer wing reduce vortices? [duplicate]

I saw the following on this web page: The purpose of the longer wing is to reduce drag caused by vortices, or wake turbulence, that form at an aircraft's wing tips. The less drag, the greater the ...
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Time of flying from Toronto to Philippines [closed]

Please I would Like to know how many hours I will be flying Across the ocean . I will be flying on an aircraft 773 boing 777.
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17 votes
2 answers
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What is the "Brake to Exit" feature on the Boeing 777X?

I have come across a new feature called BTE (Brake to Exit) on the 777X, but I am unable to find any documentation related to that. There are vendors who are working on this technology for the 777X.
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What main landing gear actuator does the Boeing 777-300ER have?

I can't remember the name of this system was, but all I do know is that is a big actuator that only exists on the Boeing 777-300ER variant. It will pressurize the actuator according to the thrust ...
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11 votes
1 answer
388 views

Why are the spoilers used as the backup controls instead of ailerons on the Boeing 777?

While reading this question, I ran across an interesting unanswered comment. Why did Boeing choose to use some of the spoilers as mechanical backup controls rather than the ailerons?
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3 votes
1 answer
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What type of jack is the flight interphone on transport category aircraft?

Recently became an A&P and part of my job is to be on the ground communicating to the pilots during push backs. Started shopping for a headset and have seen various ones with different adapters ...
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Which aircraft are 76A, 76B, 77E, 77F?

I have a list of of aircraft types like so: ...
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39 votes
2 answers
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MH370 blackbox - is it still possible to retrieve data from it?

If the blackbox of MH370 were to be found today, would it actually still provide any information, assuming that it was in 5km deep water or so for some 5 years now? If not, why would you still be ...
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B777- In emergency mechanical back up how does the flight controls manage engine failure

In case of engine failure above the ocean with multiple electrical failures and after having exhausted the batteries the fly by wire mechanical backup with available hydraulics if left with the THS ...
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3 votes
1 answer
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Why didn't Boeing make the Sky Interior for the Boeing 777?

Generally, Boeing has attempted to make the interiors of their aircraft as similar as possible, with one "unified" interior across different aircraft (i.e. based on a single "look and ...
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How to apply the TO/GA time and EGT limits?

If there is a published 1) EGT limit and a 2) TO/GA time limit, which one should be applied when the EGT is well below the EGT limit and possibly even below the 'max continuous' EGT. Particularly with ...
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0 votes
2 answers
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How long are the nacelle strakes on a GE-90?

For my school project, I'm doing something where I create a nacelle strake on a model plane and I want to make it to scale. Could you please let me know the dimensions of a nacelle strake? I would ...
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2 votes
0 answers
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Can 7 AKE containers adjacent to each other be securely locked in a 777-300ER's aft cargo bin?

Is it possible to securely lock 7 AKE (LD3) containers adjacent to each other in a Boeing 777-300ER's aft cargo bin from position 31 to 41 (41 included)? According to my experience it's impossible to ...
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2 votes
1 answer
750 views

Why was Air India flight AI101 diverted to SHJ 5 times in the past few days?

Air India flight AI101 using a 777-300ER on multiple westbound and eastbound routes was diverted to SHJ airport in Sharjah, UAE. I am curious if there is a specific reason. It cannot be a coincidence ...
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3 votes
2 answers
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Is Saudia's 777-368ER The Longest Passenger Aircraft?

I watched a video about passenger aircraft length (video was removed from YouTube) It says the longest passenger aircraft is Saudia's 777-368ER. Saudia web site says their 777-368ER is 78.86m. But ...
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