Questions tagged [commercial-aviation]

Commercial aviation is the part of civil aviation, whether general aviation, non-scheduled service, or scheduled airline service, that involves operating aircraft for hire to transport passengers or cargo.

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10
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2answers
2k views

What was the first commercial aircraft to have a 'built-in' oxygen system?

(Source) Boeing 307 of TWA, the 307 was the first pressurized passenger aircraft. The 307 (c. 1938) flew as high as 23,300 ft, lower than the jets of nowadays, and did not have a built-in oxygen ...
42
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4answers
11k views

How many lives would be saved if the airlines turned all the seats around?

The psychology and history of forward-facing seats has been answered well already here. I ask instead about how bad it is that seats are forward-facing. For context, I was looking through Wikipedia's ...
3
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1answer
310 views

What is the best pair selection algorithm?

Distance Measuring Equipment selection criteria is said “those closest to the aircraft and which intersect at an angle between 30 degrees and 150 degrees" (also said one whose geometry is closest to ...
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3answers
3k views

What is the purpose exactly of a ‘Control Check’?

I recently watched an Air Crash Investigation episode where Qantas flight 32 lost an engine shortly after takeoff. It was revealed that a stud pipe in a Rolls-Royce engine was made incorrectly, ...
50
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6answers
15k views

Why was my flight cancelled due to bad weather while other flights were not?

I'm stuck in Frankfurt. I missed my connection due to a delay. I was rebooked, but this new flight was also cancelled due to bad weather. About 30 percent of all flights were cancelled today. ...
11
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1answer
805 views

Are CVR and FDR reset after every flight?

Recording the thousands of parameters and voice conversations must take a huge amount of storage, and so I am wondering, how frequently is this data "deleted", so it can be used again? For example, ...
7
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1answer
431 views

Are there any autopilots that are capable of landing a damaged aircraft better than any human?

How close are we to commercial aircraft with autopilots that can, as safely as theoretically possible, land an aircraft with damaged, missing, or otherwise inoperative control surfaces; or altered ...
1
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1answer
489 views

What is the average number of daily flights for all types of aircraft in use worldwide?

I'd like to know how many flights occur on average every day worldwide. This includes all commercial passenger and cargo aircraft, all non-commercial aircraft, private aircraft and military aircraft. ...
14
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7answers
3k views

Why can a plane land in zero visibility conditions but not take off in zero visibility?

After waiting hours for a flight departure delayed because of heavy fog, I wonder why planes can perform an instrument landing with no visibility, but cannot take off without a minimum visibility.
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2answers
825 views

Is wheel well overheat detection (not brake temperature sensor) necessary for commercial jet aircraft?

Some aircraft do have this detection system (many Boeing aircraft), some do not. Why? What's the main purpose of the wheel well temperature detection system, even though there are brake temperature ...
9
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3answers
2k views

How much computing power is needed to keep commercial and military planes flying?

I've always wondered, what sort of computing power is needed to keep modern commercial and military planes in the air? There are many systems of a modern commercial plane (e.g an Airbus A350), that ...
2
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1answer
483 views

What material is used to make engine covers for passenger airliners?

What material is used to make the engine shrouds for passenger airliners?
1
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1answer
452 views

What is NH overspeed test and how it is preformed on DHC Q400 aircraft?

In the Aeroplane Operating Manual of DHC Q400 aircraft it is written that, at the time of normal engine shutdown, the engine system tests the NH overspeed circuitry by using it to shutdown the engine. ...
4
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2answers
983 views

How many hydraulic systems does the Boeing 757 series have?

How many hydraulic systems does the B757 series have, does it have a Power Transfer Unit (PTU)? What is the operating pressure of the hydraulics in the Boeing 757? How big is the hydraulic reservoir?...
5
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2answers
690 views

What kind of work you can get with a private pilot licence?

I´m planning to be a pilot, i just want to know if you can work only with the private licence and where.
16
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2answers
4k views

Why is 3000 psi the most common hydraulic pressure used in commercial aircraft?

As per the article on this website (from 2002), most of the aircraft use 3000 psi as hydraulic pressure: Since the 1970s, military aircraft have been using 5000 psi hydraulic systems, which use ...
1
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1answer
129 views

What airline academies are available to US citizens?

It seems that EU/Asian/Middle Eastern citizens have the opportunity to apply for several self-funded programs which (upon acceptance and completion) guarantee a job as a first officer on small twin ...
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2answers
214 views

What market share does Jet A-1 have in the commercial airline market?

I know that Jet A-1 is the most widely used fuel in the commercial airline market, but what is its market share in percentage? Are there any big users of Jet A rather than Jet A-1? And if so, why?
2
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1answer
73 views

Are there any Part 135 (On-Demand Passenger Charter) companies out there that use Aviation Bio-Fuel?

I was recently approached by a client asking if I can provide charters on environmentally conscious aircraft that run on Aviation Bio-Fuel. Anyone have any insight on what is required for an ...
29
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2answers
11k views

How much of an improvement would a 1% weight decrease on an airplane be to the industry?

Say I thought of a very easy and inexpensive way to reduce the takeoff weight of a commercial airplane (body, fuel and passengers) by 1%. How much would this mean to the industry? Would it make much ...
1
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0answers
54 views

Estimating the fuel required in terms of flying distance and total weight [duplicate]

I am looking for a mathematical model to estimate trip fuel required. I have searched the internet but not found any specific mathematical model as such. The question is formulated as follows: Let $...
8
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1answer
1k views

Why would flares be fired into the air after a flight lands?

On Monday 23rd September at about 14:30 BST my plane landed at London Stansted. Soon after landing, while the plane was at the end of its deceleration, I noticed what appeared to be two flares or ...
3
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1answer
3k views

What type of hydraulic oil is used in the aviation industry?

Among the three different types of hydraulic fluid types (mineral based/petroleum based, synthetic esters, naturally occurring vegetable oils) which one is used in the aviation industry and why?
1
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1answer
4k views

What are the differences between type B message format and EDIFACT message format?

IATA say's the standard format for transmitting passenger messages is UN/Edifact. Somewhere else it says the standard is type B format. what are the differences between these two? Or are they a same ...
2
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3answers
366 views

Who activates the fasten seat belt warning on commercial flights?

Who activates (and de-activates) the "fasten seat belt" warning on commercial flights? I would guess it is either the pilot in command (normally the captain) or the first officer (co-pilot). If the ...
6
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1answer
260 views

What do the various lights in the overhead aisle light cluster of a Bombardier Q400 NextGen represent?

I took this picture of an overhead aisle light cluster in a Bombardier Q400 NextGen. Copyright: self I am inquiring about the role of the bottom row of six rectangular lights. From right to left ...
5
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1answer
253 views

What educational qualifications are required to become a pilot in the UK?

In order to obtain a pilot's licence in the UK, are any formal educational qualifications (such as school-leaving certificates) required? As well as any statutory or other formal requirements, do ...
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0answers
160 views

Are there any civil programs that uses S1000D?

For civil programs, aircraft documentation (especially maintenance) used to follow ATA 100 or ATA iSpec 2200. S1000D, on the other hand, is mostly used in military programs, but civil program may use ...
3
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1answer
293 views

How airplanes of new generation communicate with ATC over remote areas? (North Atlantic Region)

How new airplanes get in contact with ATC while flying in remote areas? Do they use VHF datalink (VDL) ?
5
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1answer
501 views

Are there rules about using the “Fasten seatbelt” sign outside of take-off/landing/turbulence?

Related to this question regarding flight attendants continuing to stand during turbulence. My understanding is that it is the law for passengers to be seated with their belts fastened during taxi/...
40
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2answers
12k views

Can commercial airliners fly over central Antarctica during winter?

For example, if an airline decided they wanted to run year round flights on the great circle from Perth to Buenos Aires with a commercial airliner (e.g. A380 or B747), would they be able to do so? Or ...
9
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1answer
641 views

If cabin lights are dimmed during night landing so that your eyes will get used to the darkness, why do they let you use the reading lights?

Everytime the question of "why do they dim the lights during night landings" pops up, people say that it's to make passengers' eyes used to the darkness if an evacuation is needed (see: Why are the ...
3
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1answer
849 views

What is the smallest aircraft to have a CVR / FDR?

I was wondering what is the smallest aircraft to have a CVR (Cockpit Voice Recorder) and/or FDR (Flight Data Recorder)? Small single engine prop can sometimes have the avionics, like the G1000, that ...
5
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1answer
2k views

What was the first commercial scheduled flight to Australia from another continent (except Asia)?

Australia has been a very isolated country, ships being the only possibility to get there from another continent if someone was not too much in a hurry. Aviation did add a new and radically different ...
7
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1answer
402 views

How frequent are unpublished holding patterns outside general aviation?

Flight regulations say that ATC may put an aircraft in a holding pattern, which is not published in the charts but I couldn't find any such case in FlightAware. I have been searching on the Internet ...
7
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2answers
2k views

How are multiple frequencies monitored at once?

In a tiny single-engine aircraft like a Cessna, all the way up to a modern jetliner like a 747, it seems the cockpits of modern aircraft have at least 4 separate airband radios, for monitoring up to 4 ...
2
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2answers
117 views

How are aviation sectionals and enroute charts created?

Who exactly handles this? Is this done by the US Government via one of its printing offices? Or is this private? I know Jeppesen does some charts, especially approach plates, but I am not totally ...
51
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9answers
11k views

Why don't commercial passenger safety videos ever explain policy instead of merely dictating it?

British Airways announced and published their new in-flight passenger safety video: I'd like to draw your attention to two pieces of instruction given in the video, ...
-2
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1answer
91 views

Where can I find reports of accidents/incindents happened on ground? [closed]

What international organization or website has the information on this topic? I’m looking for reports, statistics and analyses of incidents and accidents (other than those involving aircraft) that ...
17
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2answers
22k views

What does the “blue” callout mean in the cockpit of an Airbus?

So from watching many videos in the cockpit on YouTube I have noticed that pilots will say stuff like "Loc Blue" or "2500 Blue" but what does this 'blue' mean and are there any other colours? These ...
0
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1answer
699 views

What is this very distinct humming noise coming from the IAE-V2500 engines of the A320 during taxi?

So I am a huge fan of the A320, and in a less broader sense, the A320 with IAE-V2500 engines. Arguably the greatest engines in the industry with the greatest sound. However though, I've had a question ...
2
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1answer
1k views

why do wings have high aspect ratios on commercial airliners?

On the Boeing 777x they have made the wing span large to increase area and therefore lift. why don't they change the aspect ratio so that the wings don't have to be that long but maintain the same ...
34
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3answers
6k views

How large are the banners that are trailed behind small planes for advertising?

How large are the banners that are used for aerial advertising, and how much do they normally weigh? Example: source: © Raimond Spekking / CC BY-SA 4.0 (via Wikimedia Commons) Wikipedia page on ...
5
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2answers
375 views

Can pilots land an aircraft with only the use of throttles?

Presuming that all other means of controlling an aircraft are unavailable to a pilot, can a pilot land a commercial airliner safely by using only the throttles and are pilots trained to do so?
7
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3answers
1k views

Does the avoidance of thrust reverser save fuel?

On 2017-06-17 i took an AirAsia Airbus A320-200neo from Hong Kong (VHHH) to Kuala Lumpur (WMKK). The flight crew avoided to use reverse thrust for slowing down the plane. Trying to find an ...
2
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1answer
475 views

Why is this 777 zig zagging over the Pacific (and delayed by 2.5 hours in air)? [duplicate]

Why is this 777 (CX 806 on June 6 2017) zig zagging over the Pacific (and delayed by 2.5 hours in air)?
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5answers
8k views

Can a few random interaction with cockpit controls result in a crash?

Lets say a monkey / snake interacts with 3 random controls inside the cockpit within less than 3 seconds until the PIC / SIC can take control of the aircraft again. Could such interactions result in a ...
8
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2answers
942 views

What safety differences exist between carrying laptops in checked versus carry-on baggage?

Recent rumors say that the laptop ban might be extended to flights originating in Europe heading for the USA. This made me think, if laptops are not safe for carriage in the cabin how can they be safe ...
28
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7answers
6k views

Why bother having different engine options on one aircraft?

When an airline purchases a new passenger jet, they often have a choice of engines (from different manufacturers). Why is this? I would expect that one of the engine options is "best" and that all ...
1
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1answer
611 views

Why hasn't Boeing updated the 747 with technology from the 787?

Why hasn't Boeing updated the 747 with technology/designs from the 787 Dreamliner? Surely this would be a very successful aircraft as it could have the best of both designs. Has Boeing explained why? ...

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