Questions tagged [safety]

Safety includes all aspects of protecting aircraft, passengers and crew from accidents, mistakes and other potentially dangerous situations.

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16
votes
3answers
17k views

Can the cockpit windows on commercial airliners open during flight?

I observed that the cockpit windows on the commercial airliners actually open - good for a hot day while waiting on the airfield, I suppose. Is there a mechanism which prevents the window from being ...
28
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3answers
8k views

Why is the most common hydraulic fluid so poisonous?

The usual hydraulic fluid, Skydrol, is poisonous. If it makes it to the air conditioning system, it causes fume events that may have adverse health effects up to and including at least one fatality. ...
3
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3answers
319 views

Why aren't angle-of-attack data sanity-checked before being fed to other aircraft systems?

For most fixed-wing aircraft, accurate angle-of-attack information is utterly essential for safe flight, due primarily to the risk of stalling the aircraft if the AoA of one or both of its wings ...
22
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6answers
13k views

Why don't commercial aircraft adopt a slightly more seaplane-like design to allow safer ditching in case of emergency?

For example : Why don't they have a more hydrodynamically shaped fuselage underside ? Specifically for the aircraft that have their engines mounted under the wings, isn't this too dangerous for ...
0
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0answers
49 views

Why do civil aviation aircraft not routinely carry missile defense systems? [duplicate]

With all the incidents with civil aircraft and missiles, why do civil aircraft not carry flares and other defensive measures by default? If official aircraft carry them it is technically possible to ...
3
votes
2answers
602 views

Is the Airbus Beluga's safety record comparable with the record of other Airbuses?

Upon first sight, to the uneducated eye, the Airbus Beluga looks incredibly 'un-aerodynamic'. Is the Beluga just as safe as other Airbus models?
4
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4answers
515 views

Is it possible to hack an airplane while it's moving (in general)?

I recently searching Airbus Careers section, and I can say that I saw too many Cyber Security job positions. It was saying in the job description that there is a need of having knowledge about ...
25
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5answers
14k views

Why is “runway behind you” useless?

I was recently answering this question and for some reason it made me think of this fairly famous aviation saying The three most useless things to a pilot are the altitude above you, runway behind ...
14
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3answers
18k views

How are engines mounted onto wings?

I've heard that the engines on a commercial air transports are typically mounted with 2 or 3 bolts. Is this true? If so, how big are these bolts and what are they made of? I'm optimizing a bolted ...
19
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1answer
6k views

What is the difference between fail-safe and fail-soft?

I have heard the following terms related to safe system design but I cannot really see a difference between fail-safe and fail-soft (graceful degradation). To get a common understanding I will just ...
37
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7answers
7k views

What prevents a commercial jet from electronically “resetting” the way a computer sometimes does?

I've had a fear of flying for the past several years and one of the ways this irrational phobia manifests is concern over the airplane power-cycling in mid-air: engines cutting out, control equipment ...
17
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3answers
3k views

Why are propellers de-iced before the engines are started, and does ice on the fuselage affect the flight characteristics of the plane?

I recently flew on a flight out of Montreal on a DHC8 turboprop. The plane had been parked at the airport overnight during a winter storm, and as I walked out to the plane, there were visible icicles ...
6
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6answers
3k views

Has a commercial jet airliner ever stalled on takeoff / at low-altitude?

In general aviation, a common reason for fatalities is low altitude stalls on takeoff or practising go-arounds. Has there ever been an incident where a commercial jet airliner stalled on takeoff / ...
9
votes
1answer
283 views

What safety rule replaced the now-rescinded two-person rule (after Germanwings 9525)?

In the aftermath of Germanwings 9525 in 2015 many airlines instituted a two-person rule for the cockpit (aka "two-man rule") - with a flight-attendant replacing whichever pilot left the flight-deck. ...
0
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2answers
155 views

Can I fly a paramotor after learning on a paraglider?

This video has inspired me to spend next week doing a 6 day paragliding course. The only downside is the school near me don't teach paramotoring. Could I buy (and safely use/self-teach) a paramotor ...
-5
votes
1answer
120 views

What is the procedure for a fast landing that is too slow for go-around? [closed]

Say an aircraft (A320 or similar) on landing, hits the tarmac way too fast and on a short runway, less than V2 but around V1 or slightly over. This could happen if a pilot had recently moved from ...
23
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8answers
14k views

Where is the safest seat in the plane?

If I'm going on holiday with my family on an airliner such as one of the ones listed on this page, then where is the safest place to sit? The answers to this question seem to imply that the seats at ...
4
votes
1answer
181 views

Who would be allowed to operate with no navigation lights over a populated area?

I know little about aircraft, FAA or FARS, but I've tried to research something I saw one evening without much success. I was hoping an expert could chime in. One evening, while watching for ...
19
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2answers
3k views

Is it safe to wear earplugs in flight?

Speaking in terms of health for the ears and eardrums, would earplugs that form an airtight seal be dangerous to wear in flight due to cabin pressure changes? What about in the event of a rapid ...
14
votes
3answers
565 views

Where does the 90 seconds limit for plane evacuation come from?

New airplanes have to confirm that all passengers have to be evacuated within 90 seconds or they wouldn't be certified by aviation authorities. But where does the 90 seconds limit come from? Why isn't ...
41
votes
4answers
37k views

How is fuel dumping safe?

The answers to this this question make it clear how modern airliners dump fuel in the case of an emergency. As far as I understand, fuel dumping might be done to lower an aircraft's weight to the ...
1
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7answers
496 views

What prevents Low Cost Carriers (LCCs) from cutting cost that compromise safety?

I was reading an article about LCCs and here is an excerpt that got me thinking. While budget airlines cut other corners to keep fares low, they do not — actually cannot — compromise the safety ...
1
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2answers
344 views

Is the IOSA useful even if not all airliners are IATA members?

Given the two facts: According to wikipedia, the IATA represent a little more than 80% of available seat kilometers. It makes sense as some airlines are not IATA members. Under each region over the ...
1
vote
1answer
130 views

Do any regulatory bodies require ISO 9001 QMS certification from airlines or service providers?

As the aviation industry is transitioning to SMS approach, is having ISO 9001 certification required from any civil aviation authority? Similar to how IATA requires IOSA certification and certain ...
4
votes
4answers
184 views

Is Turn and slip indicator a good back-up for the attitude indicator?

I was reading my Aircraft general knowledge book, and noticed something peculiar that was written. The book described that the turn and slip indicator works as a back-up in case of a malfunctioning ...
31
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3answers
8k views

How serious is an impact like the 10/2017 Delta Airlines suspected bird strike?

Recently, there was an incident where a Delta Airlines charter flight carrying the Oklahoma City Thunder basketball team was struck by an "unidentified object". Delta's official statement claims that ...
13
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3answers
2k views

Is there any obvious warning when auto-pilot is disengaged or when the mode changes?

Under the investigation section of the First Air Flight 6560 incident, it describes the catalyst for the accident: The approach was entirely flown on autopilot, which was correctly set to capture ...
4
votes
2answers
321 views

What conditions cause the gear-up warning to sound on a Bombardier DASH-8?

As the title says, what conditions cause the gear-up warning to sound on a Bombardier DASH-8?
2
votes
1answer
143 views

Why are the VHF and UHF airbands directly adjacent to frequency bands used by vital radionavigation aids?

Of the three main frequency ranges used by aircraft for radio communications (HF, VHF, and UHF), two (VHF and UHF) have their aircraft-radio-communications frequencies clumped together into a ...
6
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1answer
2k views

How do pilots clear an aircraft to fly through a hurricane?

This video shows a pilot (Tim Gallagher/NOAA) flying what looks like a small jet into the eye of hurricane Matthew by Miami. It's clear that it is quite an interesting ride. The (small) caption states ...
9
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8answers
6k views

Can a handgun shot take down a commercial airliner?

Most airplanes, when taking off or landing, are in range of small arms fire, i.e. your every day handgun. Is it possible to take down a commercial airliner by shooting at it with a handgun? Would one ...
7
votes
2answers
910 views

Why are the transition altitudes/levels different around the World?

I got tasked by my instructor pilot to find out why each country has a different transition altitudes / levels. For example in the US it's FL180 and in Saudi Arabia it's FL150. Can someone help me ...
0
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2answers
104 views

Is potentially dangerous to select the take-off power on airliner lower that temperature at the moment on the airport? [closed]

Is potentially dangerous to select the take-off power on airliner at lower settings value due to the temperature that could be increased by the time the aircraft will go up?
0
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1answer
57 views

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.
3
votes
2answers
280 views

What needs to be considered when changing a tire during boarding/deboarding?

Passenger aircraft tires are physically inspected by the cockpit crew member or technician after each landing or before take-off, that the tire may have been cut or punctured as it may have hit ...
29
votes
5answers
15k views

Why didn’t the Captain of Cathay Pacific flight 780 shut down engine 1 and land with a more reasonable speed?

In the approach phase, engine 1 of Cathay Pacific flight 780 got stuck at about 70% N1 and it forced the crew to do an overspeed landing (230knots). Why didn't they shut it off by turning the fuel ...
17
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2answers
743 views

Who said “A little of all of us goes with every pilot we lose”?

The only attribution I’ve ever seen for the quotation below is “Anonymous FAA Inspector.” Whenever we talk about a pilot who has been killed in a flying accident, we should all keep one thing in ...
0
votes
1answer
197 views

Why do pilots wait for a positive rate to put the gear up, When V1 means “commit to takeoff”?

To explain further, V1 means they cannot stop in time if anything happens. Therefore they must commit to taking off. So why wait for a positive rate? Shouldn’t it be retracted as soon as they see a ...
4
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2answers
245 views

Are there any safety features to prevent reversible-pitch props from reversing in flight?

Some aircraft have propellers capable of reversing pitch, which is also known as beta angle. The example I saw was an Aviat Husky. (Youtube demonstration) I want to know if there are any safety ...
24
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8answers
8k views

Are there any real life instances of aircraft aborting a takeoff or landing to avoid a vehicle?

I came across a fake video of an A380 closely avoiding a fuel truck. More details at Snopes including a link to the YouTube video. While this video is not real, I'm interested in finding out if it's ...
13
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2answers
1k views

Have there ever been any accidents within holding stacks?

At a busy airport, up to a dozen aircraft waiting to land may fly the same holding pattern at the same time, separated vertically by 1,000ft. — a stack. Some ATC towers have dedicated Stack ...
8
votes
3answers
560 views

Has there ever been an uncommanded lowering of landing gear?

Has there ever been an uncommanded lowering of the landing gear on a large commercial jet? I could not find any instance of it in a preliminary google search. Could a simple short-circuit cause such a ...
41
votes
5answers
80k views

How much is the minimum safe distance between two planes in-flight?

According to FAA regulations, how far should a commercial jet be away from another plane in-flight? How about military planes? They get really close when in formations... Is there a minimum distance?
31
votes
3answers
8k views

Why was a flight delayed because of a bird in the cockpit?

This Washington Post article is about a Delta Airlines flight that took off after an initial delay, before turning back again shortly after, because of a bird that managed to stowaway in the cockpit. ...
22
votes
1answer
4k views

How short does a trip need to be before flying is less safe than other forms of transportation?

It's often mentioned that flying is the safest form of transportation, and no doubt this is true when considering only a long-haul trip. There's no doubt, for example, that driving (or taking a train ...
1
vote
1answer
141 views

How long is maximum time to investigate an airplane crash?

Lion Air flight 610 was crashed on 29 October 2018. It was Boeing 373 Max 8. Almost one year ago. I have not heard any news from National Transportation Safety Committee (NTSC) when they will release ...
4
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2answers
91 views

How can the effects of hot corrosion and salt deposits from sea water spray in gas turbine engines be negated/prevented?

In aircraft operating in a maritime environment, corrosive effects from salt water are common. Are there any specific coatings used in engines for such aircraft? If so, which are they? How frequently ...
13
votes
1answer
5k views

Why does Canada recommend a minimum rate of climb for ultralights of 300 ft/min?

What is a safe minimum rate of climb for ultralights? I understand most ultralights climb at least 300-800 ft/min and in fact the Canadian ultralight specs recommend a minimum rate of climb of 300 ft/...
10
votes
2answers
807 views

What if a aerobatic fighter pilot sneezes in middle of a maneuver?

No offense to any pilots, I am a student, curious. I just watched Spy (2015) and I was just wondering what happens if one of the pilot accidentally sneezes during a difficult maneuver. Jude Law ...
9
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2answers
2k views

How often does fan blade out happen?

Jet engines are designed to contain a fan blade failure, and the engines and airplanes are designed with this type of failure in mind. This is more critical in the modern high-bypass designs with ...