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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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2answers
337 views

How do aircraft stall warning systems handle (or not) asymmetric-stall situations?

Most, if not all, new airplanes are required to have stall warning systems to (as the name should make clear) provide the pilots with a warning when the airplane is about to stall. Most stall warning ...
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0answers
43 views

Why are airline seat belts lap-only? [duplicate]

On the flight that I was on today, one of the passengers near me asked this question. Why don’t airplanes use lap- and shoulder belts like cars do?
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6answers
13k views

How do I determine odd or even when working with altitudes?

I am always confused about how to calculate safety altitude, especially when it comes to even heights and odd heights, e.g. is 7500ft even or odd?
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652 views

To what extent have political (race, gender, social class) attitudes been implicated as human factors in the cockpit?

This question is related to: How does cultural difference impinge upon human factors in aviation industry safety? How have deep-seated cultural human factors (particularly in east Asia) in the ...
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8answers
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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 ...
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66 views

Cessna 421b pressurization cycles

How many pressurization cycles can be expected in a Cessna 421b before it fails? Is pressurization failure in a Cessna 421b likely to be catastrophic?
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1answer
873 views

How prevalent are anti-explosion bladders in fuel tanks?

Some aircraft fuel tanks are fitted or retro-fitted with internal bladders, to prevent fuel evaporating inside the tank. I've heard of this being a requirement for at least one type, perhaps because ...
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60 views

Source and Impacts of cracks on window pane? [duplicate]

Today, I spotted cracks on the outer window panes, of my aircraft, VT-GWH, a 11 year old A320. The cracks were present on every window pane that I could see. On simple observation, I found that the ...
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3answers
15k views

Why are so many ATR involved in accidents in the past years`?

I asked myself a question why are so many ATR involved in accidents in the past years? ATR-72, 16 October 2013, Lao Airlines Flight 301 ATR-42, 19 October 2013, P2-PXY, Air Niugini ATR-72, 23 July ...
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4answers
3k views

Was the miracle on the Hudson saved exclusively by the APU?

In the film Sully, (staring Tom Hanks) the APU is switched on straight after both engines rollback, why was this step necessary; Airbus said this was the "15th thing" to do on the checklist. How or ...
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3answers
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If the “Fuel Shutoff Valve” is ON, wouldn't fuel be cut off?

Ok, so this may be more of an english lanugage question, and I can confirm from context that when the fuel shutoff valve is ON fuel does indeed flow to the engine, but wouldn't that just make more ...
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2answers
606 views

What are regulations for pyrotechnics on planes?

Being in love with both fireworks and flying this is a question that I wondered about for quite some time. Especially when watching videos like this (which is from 2009 showing a stunt plane flying ...
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2answers
379 views

What does “leave clear on its left” mean in UK regulations relating to collision avoidance on non-runway landings?

This doesn't seem to be plain English, could someone explain this with a simple example for me please? I'm not sure what 'Leave clear on it's left' means, and it's not clear whether the subject of the ...
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5answers
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How can cargo be jettisoned from a C-124 in flight?

I was reading about a C-124 that was carrying three nuclear weapons over the Atlantic, and developed engine trouble. The article said that two of the weapons were jettisoned into the ocean for safety ...
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1answer
539 views

What is the wattage for strobes and anti-collision lights flashing lights on an aircraft?

Flashing anti-collision lights, also know as strobes on an aircraft can be seen on the aircraft When flying at 36,000 ft during the day with clear skies. What is their wattage (e.g 1000 watts) since ...
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3answers
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How are Virgin Galactic's SpaceShipTwo's windows so large?

From Virgin Galactic on SpaceShipTwo: Windows in the passenger compartment will be 13 inches (33 centimeters) wide by 17 inches (43 centimeters) tall. IMO that's enormous for an airplane, ...
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Marshall signals history

When airport marhall signals have been used for the first time? Wich is the history about these signals? Thank you
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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 ...
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1answer
304 views

Which items are allowed on passenger flights but not on cargo ones?

I've only ever sent items by air in suitcases accompanying me in passenger flights. But - I'm about to send some items on a cargo-only flight in a few days. I've been told: Make sure that there are ...
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3answers
262 views

What warning lights can one safely fly with? [closed]

Like many people, I often either ignore or reset warning lights in my car and continue to drive without issue for months or years (usually due to dodgy sensors giving a false-positive). What warning ...
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2answers
144 views

What prevents the use of an EMAS along the sides of a runway?

The NTSB report about the crash of American Airlines Flight 1420 discusses whether an EMAS would have mitigated the severity of the accident, but concludes, based on testimony from a representative of ...
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2answers
8k views

Is it allowed to listen to music while piloting a plane?

When I'm driving my car, I almost always put some music on. It's really relaxing for me. I know that piloting a plane is nothing like driving a car, but it would be great, at least for me, to listen ...
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4k views

Is there an audible warning on commercial aircraft if you try to land gear up?

In one of the comments on this question (under the accepted answer), someone remarks that Aircraft can legally fly without a system to alert the crew when they are landing with gear up, etc. Are ...
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1answer
390 views

Is there research suggesting that VFR cruise altitude rules improve safety?

In the United States, 14 CFR 91.159 prescribes cruising altitudes for level flight under VFR: (a) When operating below 18,000 feet MSL and (1) On a magnetic course of zero degrees ...
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510 views

Why was the 737 main rudder servo valve’s vulnerability to causing uncommanded reversals never discovered in testing?

As was discovered during the NTSB investigation into the crash of USAir Flight 427, the design of the servo valve inside the main rudder power control unit (PCU) formerly used on 737 Original- and ...
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0answers
803 views

Is the Boeing 737 unusually susceptible to stress fatigue?

According to this Newsweek article - which seems like a reputable source - the FAA has issued a number of Airworthiness Directives to address stress fatigue concerns with the 737NG series: Between ...
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2answers
4k views

How can a pitot tube freeze when it's heated?

Reading Why turn off pitot tube heating?, it appears that the pitot tube heat can be switched off to extent its lifetime and also in case of short-circuit. (Thales pitot-static probe, source BEA) On ...
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1answer
359 views

How safe are sail planes? [closed]

I think sailplanes have to be pretty safe. Because if it falls it will gain speed, which will be converted to lift. So unless you do something stupid sailplanes can't just fall out of air. Am I ...
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1answer
269 views

Why didn’t the 757 have manual-reversion capability?

The Boeing 757 was the highest-capacity and latest-designed narrowbody Boeing ever produced (and, in the case of the 757-300, the highest-capacity narrowbody anyone ever produced); it was also the ...
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3answers
251 views

Are there statistics showing the relationship between safety and the age of aircraft?

Some people seem to believe that some airplanes are less safe to fly just because they are older than others. As a pilot myself who has learned that the safety of aircraft is nothing to do with their ...
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1answer
529 views

Why is the A330/A340's angle-of-attack protection disabled in alternate law, even if the AoA vanes are operating normally?

Reading about Air France Flight 447, to quote Wikipedia (emphasis added): ... A second consequence of the reconfiguration into alternate law was that stall protection no longer operated. Whereas in ...
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8answers
6k views

Why would all passengers be asked not to eat peanuts when there is one allergic person on board? [closed]

In this review of BA British Airways Club World London City flight there is one thing I don't understand: ... it was announced that a passenger onboard had a severe nut allergy, so they asked ...
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7answers
20k views

Why don't 747s use unreliable, but cheap, jet engines instead?

I'm a neophyte who was reading a little bit about jet engines, and the economics behind them. In particular, I was curious about what makes jet engines so expensive compared to piston engines. A ...
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2answers
394 views

Why don't commercial aircraft have drag chutes for aborted takeoffs? [duplicate]

We were watching the program Air Crash Investigation and there was an episode where it was too late to abort the take-off and the pilots had to attempt to climb still but since an abort was not ...
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2answers
185 views

Do any aircraft automatically test that the pitot-static system is functioning properly before liftoff?

Given that a properly-functioning pitot-static system is absolutely essential for flight (a plane cannot be flown without valid airspeed data, or at least not for long), are there aircraft that ...
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1answer
518 views

Why is the GP7200-powered A380 fleet not grounded?

After the Qantas A380 engine failure, all Trent-powered A380s were grounded.1 After the Air France A380 engine failure, the GP7200-powered A380 fleet was not grounded. Why were these two incidents ...
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0answers
127 views

Could I Legally Fly a Paramotor as a Commuter Method [duplicate]

I get permission from company security to fly into work using my paramotor (I don’t have one, but would like to get one). We have six offices around the city. The city has two airports: one major ...
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2answers
241 views

What margin of error should one reasonably allow regarding aircraft performance?

This question generated a lot of discussion around amateur pilots often making the mistake of calculating aircraft performance based on perfect conditions and not allowing for a 'safety factor' (i.e. ...
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1answer
464 views

How to increase your chances of survival in a plane crash? [closed]

More than 90% of plane crashes in recent years had survivors. In America, for example, there were 568 plane crashes between 1983 - 2000: Out of the collective 53487 people onboard, 51207 ...
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2answers
301 views

Why aren't runway numbers painted in a higher aspect ratio?

I'm watching a lot of aviation youtube channels and it seems to me that when attempting a landing on a "normal" glide path, it must be quite hard to read the runway numbers until you're on short final,...
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0answers
52 views

Oversight responsibility in the delegated airspace

Who retains the oversight authority in the delegated airspace when an airspace of one State is delegated to another State fir the provision of Air traffic Services?
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2answers
3k views

Why did my business class seat have a three point shoulder harness?

I recently rode a short haul international flight on Asiana Airlines AAR111 from KIX to ICN. I was surprised that my business class seat had a three-point shoulder harness given that we’ve discussed ...
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2answers
2k views

Why are passengers not given the option of shoulder harnesses?

From this question: In airliners, shoulder harnesses are not installed for passengers because: it is not mandated by law it is too much for average passengers to deal with it requires ...
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0answers
111 views

Why don’t most aircraft have emergency braking parachutes? [duplicate]

Braking parachutes were standard on first-generation jetliners, but have since fallen almost entirely out of use except on military aircraft; essentially the only civilian aircraft nowadays to still ...
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2answers
279 views

Why aren’t multiengine general-aviation aircraft required to be capable of sustained single-engine flight?

While perusing the See How it Flies website, I came across this alarming statement regarding multiengine general-aviation aircraft: You must not allow yourself to think that just because airliners ...
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1answer
425 views

Why do pilots typically start out in piston-engined aircraft, rather than jets or turboprops? [duplicate]

Essentially all pilots begin flying with propeller aircraft powered by piston engines, rather than in turboprops or light jets, even though: Operating a piston engine requires adjusting the mixture ...
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1answer
1k views

What is the maximum acceptable gap between the jet bridge and airplane door?

I noticed on an American Airline flight a gap of about 4 inches between the floor of the bridge and the airplane. Wide enough that if the passenger is not paying attention to the floor the foot may ...
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1answer
167 views

What are the differences between the two main brace positions? [duplicate]

Why are there two different brace positions (pictured below) ? (If there is a difference between the official and true reason, please state both. In many planes the reduced seating spacing does not ...
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3answers
539 views

How do pilots decide whether to circumnavigate bad weather?

How does an airline pilot decide in the air whether to circumnavigate or fly through bad weather visibly looming ahead and/or displayed on the weather radar ?
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1answer
151 views

What is an “unsafe airline”? [closed]

Question: Is there any internationally accepted definition for what an "unsafe airline" is based on objective criteria (e.g. fatalities per million passengers) ? Or is there an international standard ...