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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4
votes
0answers
109 views

Why do they tell you to tie your lifevest on the left side during safety briefings?

This might be UK specific, given I have only been flying internally recently. During the safety briefings, when describing how to inflate the lifevest the instructions are always: "Wrap the lines ...
49
votes
3answers
9k views

How dissimilar are redundant flight control computers?

Facts On Airbus aircraft there are computers to secure the flight envelope, or to move the control surfaces. FADECs totally control the engines. Computers take decisions in place of the pilots, or ...
7
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3answers
654 views

Do some flying techniques wear aircraft out quicker than others?

In the 2012 film Flight, the cause of the mechanical failure is a sort of worm-screw that controls the rear tailplane. And I believe that in real life failures in those devices have been implicated in ...
2
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1answer
2k views

What is the requirement for fire fighting equipment on board a passenger flight?

What is the legal requirement regarding fire fighting equipment on a passenger flight, e.g. fire extinguishers and fire hoods? I imagine that the number is proportional to the airplane's max capacity. ...
5
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4answers
255 views

What accidents have had crew accustomization to warnings among their causes?

A non-answer on this question claimed that: the idea that maneuvering with the stall warning activated will somehow damage us, causing us to ignore its warning when the chips are down and AOA is up,...
4
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4answers
210 views

For calculating $V_{stall}$, why should be used $C_{L,max}$ and not $C_{L,min}$ (that would be more prudent)?

Premise: In level unaccelerated flight we have relation $W=L=\frac{1}{2}\cdot\rho\cdot V_{stall}^2\cdot S\cdot C_{L,max}$ (taken from book Daniel P Raymer "Aircraft Design: A Conceptual Approach" ...
1
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1answer
69 views

What is the most critical data to measure for a predictive maintenance model for a drone? [closed]

I'm looking at making a predictive maintenance model for a drone (quadcopter mainly but can include others) I'm wondering what is the most common causes of failure due to "overflying". (not including ...
11
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4answers
2k views

Can we eliminate the center tank of large passenger planes?

This is a safety question about fuel and fires. This all regards commercial aviation for large passenger planes. Most fuel is stored in the wings, but in the largest planes, there's also a center ...
10
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2answers
3k views

Is it allowed and safe to carry a passenger / non-pilot in the front seat of a small general aviation airplane?

Is there anything wrong with taking a friend in the copilot's seat of a small general aviation aircraft with me flying, or does he have to sit in the back (if there is one)?
30
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5answers
8k views

Why are passenger seats not facing backward on an airplane?

In the event of a crash, facing backward sounds much safer: Forces are applied on a much larger surface (your whole back is in contact with the seats, instead of just a seatbelt and maybe the ...
2
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3answers
1k views

Which is safer? The Piper Tomahawk or the Cessna 152?

I have booked my first flying lesson for 2 weeks time, in my first step to obtain a PPL or LAPL. I had done all of my research on the Cessna family, assuming that is what I would learn in. I was ...
9
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3answers
433 views

Is it common for automated control systems to use non-redundant sensors?

While reading an article about the Lion Air Crash with a Boing 737 Max 8, I was very surprised by the following paragraph: In designing the 737 Max, Boeing decided to feed M.C.A.S. with data from ...
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2answers
201 views

Is “hacking small planes” a separate or larger problem from/than general small-aircraft security?

Apparently the DHS has issued a "hacking alert" for small aircraft: The alert warns if a hacker gained physical access to certain small planes, they could attach a common device to its wiring. This ...
0
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0answers
67 views

Seat aisles blocked by baggage [migrated]

On a recent full flight there was no room overhead for my standard cabin bag which had even been given an approved sticker when I checked my baggage in. The FA instructed me to put it under the seat ...
6
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2answers
5k views

How many bird strikes are there per year? Any world-wide statistics?

Does anyone know where I could find where the highest rates of bird strikes are? Along the same lines, other wildlife, such as moose or bears on runways?
1
vote
1answer
277 views

Is this plane safe to fly on? The turbine blades look damaged [closed]

While waiting for a recent flight, I observed this aircraft with what appear to be rather worn turbine blades. Is this close to being a safety issue or is it purely cosmetic?
5
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1answer
290 views

One man push-back

Towbarless pushback operation of a passenger aircraft is generally done with at least 2 people. The first person (walk-out assistant) communicates with the cockpit crew members and observes the ...
2
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0answers
108 views

Do visual docking systems improve safety?

Are there any studies that shows A-VDGS (Advanced Visual Docking Guidance System) is improving the safety of aircraft movements on airports?
33
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10answers
13k views

What would be the safest way to drop thousands of small, hard objects from a typical, high wing, GA airplane?

The subject pretty much states my question, now I will provide a bit of background. A family member, who lived on the west coast of Florida Manasota Key, collected tens of thousands of fossilized ...
3
votes
1answer
140 views

Are there any safety features to prevent reverse 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 ...
36
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6answers
13k views

Why do we say certain things three times (e.g., “Mayday, Mayday, Mayday”), rather than two or four?

Repetition is a key characteristic of communication in the control tower, cockpit, and control room. Some phrases, like "Mayday" get repeated. The speaker says the same thing three times. We know ...
0
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3answers
162 views

What's the relation between speed of an aircraft and takeoff distance?

I'm making a tool that when given : weight of aircraft , takeoff speed , runway length and some other parameters , it analysis the takeoff performance and states whether using the brakes now is safe ...
50
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9answers
10k 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, ...
21
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4answers
8k views

Is there a legal maximum altitude?

In the US, is there a highest legal altitude allowed for certain planes and does it depend on the plane? I heard from a sort-of-reliable source that the maximum is 45,000 feet but I haven't been able ...
22
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5answers
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 ...
18
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2answers
4k views

What improvements did Airbus make as a result of the Air France 447 accident?

As far as I can tell, the following factors all contributed to this crash: Pitot tubes susceptible to ice crystal blockage Crew not aware that they can stall the airplane due to alternate law No ...
29
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8answers
12k views

Why aren't cell phones allowed to be used in aircraft?

What problems do cell phones cause? How is using a cell phone in the air different than using it from the ground?
1
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1answer
130 views

Is it Ok for co-pilots to snooze? [duplicate]

What are the policies on long flights and taking shifts sleeping between 2 pilots? Could a pilot set the cruise control and alarm during any flight?
18
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2answers
779 views

What makes it safe for the DC-8 to use reverse thrust in flight?

For most jets, the use of reverse thrust to slow down in flight, where even possible, is extremely dangerous, and strictly prohibited. Not so on the DC-8, which is certified for the safe in-flight ...
17
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3answers
2k views

When do flights get cancelled due to fog?

When flights get cancelled due to fog, what triggers the cancellation? Fog is too thick, too wide-spread, blocks the view of tall buildings or other landmarks? Or is the problem the type of air ...
1
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1answer
149 views

Is it possible for crew oxygen to exacerbate a flight deck fire?

Crew oxygen is, as I understand it, a very high percentage of purity. Oxygen-enriched air acts as an accelerant to a fire, causing things to ignite which wouldn't in ordinary air, and making fire ...
3
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3answers
9k views

Under what conditions would a helicopter be allowed to fly at low altitude over populated areas?

Yesterday, the Department of Energy was flying a military helicopter at low altitudes over Boston and the surrounding area as part of an experiment of some type to measure radiation. I saw one of ...
44
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6answers
9k views

Is a weak battery a valid reason to reject a rented aircraft?

Today I had rented a Piper Archer III for a local flight. After taxing to the fuel and filling up, I went to start the plane again and it did not want to turn over. This particular plane is somewhat ...
11
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1answer
1k views

What are the design parameters for airliner safety?

Airliners designed to carry multiple airfare paying passengers are regulated by CFR 14 Part 25, and by EASA CS-25. The design regulations are such that the probability of a catastrophic failure with ...
1
vote
1answer
279 views

What is this loose object above the flap fairing? [duplicate]

During my flight, I noticed a loose object above one of the flap fairings. You can see it in this video: https://imgur.com/wCPSEem. Is it normal or should I notify the airline? People pointed out to ...
6
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2answers
290 views

Reclined seats for take off and landing

Normally on commercial flights, passengers are expected to bring their seats to an upright position for take off and landing. There are a few valid reasons for this. A little while ago, on a couple ...
-4
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1answer
186 views

Why do this airline experience more hard landings than others? [closed]

Ryan air has a reputation for hard landings, watching this video at the 2:22 mark and reading the subsequent comments (along with personal experience) suggests many people find the landing with Ryan ...
2
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2answers
224 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 ...
4
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3answers
1k views

What are the advantages of Chemical Oxygen Generation over Gaseous Canisters on board of aircrafts?

I'm looking to get a bit of info on Chemical Oxygen generation, especially as done on aircraft. I understand the process of Chemical Oxygen Generation. I'm also aware that weight for weight it ...
1
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0answers
69 views

Are tiltrotor planes less safe than conventional propellor planes?

I got interested in Tiltrotor type of airplanes and was reading up about some specific models, the AgustaWestland AW609 and the Bell Boeing V-22 Osprey. Both planes have a history of quite a few ...
3
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2answers
150 views

Eviation Alice Powerplant Placement

I saw an article from the BBC about the Eviation Alice this morning that left me puzzled. The design is a tail wheel tri-motor with the power plants located in a pusher configuration at the wing tips ...
47
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3answers
23k views

What is the technique or procedure to disable/disengage the MCAS on Boeing 737 Max 8 & 9 Aircraft? [closed]

With regard to the recent crashes involving the Boeing 737 Max 8 aircraft, where according to preliminary reports, it appears to be related to the MCAS, which is a safety system that pushes the nose ...
33
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6answers
36k views

Why does the Boeing 737 have 5 x the passenger fatalities of the Airbus 320?

I thought I'd compare the accident rates of these two similar, competing, very successful aircraft. ...
40
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5answers
77k 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?
3
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1answer
114 views

Is there a Risk of Tail Tipping during Push-back of a passenger aircraft?

I remember that there were countless incidents occurred in which the aircraft sits on the tail as the aircraft was heavily loaded at the back of the cargo and/or cabin compartments or the cargo ...
2
votes
1answer
301 views

Does a no-touch policy really work?

In Boeing 787 and Airbus 350 aircrafts, more than half of the aircraft body is made of composite material. The composite structure of the fuselage does not indicate the damage when the body is ...
5
votes
1answer
355 views

Are there any safety hazards when testing the F-16's fire control radar on the ground?

What are the procedures for ground testing an aircraft's fire control radar - for the F-16 or any other aircraft - and are there safety hazards associated with exposures to humans? Most importantly, ...
19
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6answers
9k views

What are the ways to keep the birds away from airfields?

I know bird strikes are a major issue for many airports, and that measures are taken to keep birds away. There are some obvious things airports can do like not to have any stray garbage, food, etc. in ...
2
votes
3answers
444 views

In modern commercial aircraft, is it possible for pilot inputs to exceed the tolerable structural loads?

It seems that modern fly by wire systems should / could limit pilot inputs to prevent structural damage. For example, American Airlines 587: From the NTSB report of the accident: The ...
13
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2answers
1k views

Would an A320 override the autothrottle due to an erroneous radio-altimeter?

The pilots of Turkish Airlines Flight 1951 had multiple issues with the auto-throttle setting itself to idle during approach: despite manually adding throttle, the plane stalled and crashed before ...