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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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15
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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 ...
7
votes
3answers
8k views

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 ...
4
votes
2answers
584 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 ...
7
votes
2answers
374 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 ...
6
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5answers
1k views

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 ...
-1
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1answer
516 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 ...
19
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3answers
3k views

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, ...
0
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0answers
87 views

Marshall signals history

When airport marhall signals have been used for the first time? Wich is the history about these signals? Thank you
5
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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 ...
3
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1answer
298 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 ...
-2
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3answers
259 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 ...
0
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2answers
141 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 ...
15
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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 ...
10
votes
2answers
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 ...
11
votes
1answer
380 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 ...
3
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2answers
475 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 ...
1
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0answers
801 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 ...
23
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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 ...
-1
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1answer
344 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 ...
2
votes
1answer
250 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 ...
4
votes
3answers
241 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 ...
6
votes
1answer
461 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 ...
13
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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 ...
32
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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 ...
2
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2answers
388 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 ...
3
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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 ...
5
votes
1answer
514 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 ...
1
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0answers
122 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 ...
2
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2answers
229 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. ...
0
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1answer
457 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 ...
2
votes
2answers
295 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,...
0
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0answers
50 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?
13
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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 ...
8
votes
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 ...
0
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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 ...
1
vote
2answers
270 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 ...
0
votes
1answer
406 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 ...
10
votes
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 ...
0
votes
1answer
156 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 ...
3
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3answers
512 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 ?
1
vote
1answer
148 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 ...
7
votes
1answer
340 views

What's with this non-exit Exit sign on Delta CRJs?

I have the pleasure of frequently flying Delta (i.e. Delta Connection) flights on CRJ-700 and CRJ-900 aircraft. All of them have a bogus EXIT sign between First Class and the main cabin: This is ...
20
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2answers
6k views

Why do commercial helo pilots wear helmets?

I've been on my fair share of commercial helo rides, primarily in Canada. Over the course of more than ten rides in three different kind of helos (Bell 407, 412, and I think one other) there was only ...
10
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2answers
5k views

Which airplane types never crashed? [closed]

Is there an airplane that never crashed? Or more specifically, without any crash history on any database. By crash, let's say any accident / incident which resulted in damage to the airplane and/or ...
20
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2answers
1k views

Are controllers aware of TCAS RA taking place?

When the TCAS issues a Resolution Advisory (RA) which contradicts an ATC instruction, the RA takes priority. Are controllers aware (notified on their screen) that a RA has been issued between two ...
2
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0answers
104 views

Would it be possible to start a modern airliner from cold & dark during flight? [closed]

Imagine a suicidal pilot or disturbed passenger who gets access to cockpit, messes with the buttons. He shuts down engines, IRS, and battery, it's the middle of the night at cruise altitude. Would it ...
24
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5answers
5k views

Why can't airline pilots listen to music while flying? [duplicate]

In an interview I read, a 747 captain (Mark Vanhoenacker, an American British Airways pilot) says he doesn't understand why he cannot listen to music inflight, when for example surgeons – who ...
32
votes
2answers
9k views

How do pilots rest on long-haul flights?

When flying on a long-haul airliner flight in economy, often I find it very hard to fall asleep. However, when off cockpit duties, they still have to get rest so that they are able to control the ...
2
votes
0answers
80 views

What is a possible reason for an L-1011 wing fuel tank overflow? [duplicate]

I was on a TWA Charter flight from Boston to Montego Bay Jamaica in 1989. During pushback from the gate, the right wing began to leak jetfuel (like gallons pouring out of the wing). They stopped the ...
36
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3answers
62k views

How do aircraft keep fuel from freezing while in flight?

On aircraft which fly above 30,000 feet, the temperature can often can get to temperatures below Jet-A's freezing point. For example: at 36,000 feet the standard outside air temperature is -56.5°C (-...