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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17
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1answer
2k views

Why is there a plateau in helicopter H/V diagrams?

The "dead-man's curve" in a typical helicopter height/velocity (H/V) diagram is commonly referenced to indicate that "towering flight" is dangerous and avoided in general practice. (Simon explained, "...
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Do flight regulations prohibit sleeping on the floor of an airliner?

During a recent trip in a Finnair A350, a couple traveling together was occupying 1 row of three Economy Comfort seats. During the 12 hour flight, one of the couple stretched out on the seats, the ...
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Are fireworks a hazard to aircraft?

Tonight's fireworks got me wondering: With all of the firework displays happening at the same time, how do they keep aircraft away from them? Is there any risk of collision or blinding the pilots? ...
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622 views

Who decided that the Boeing 737 MAX planes that were airborne when the grounding was issued cannot enter and land in EU air space?

On March 12th, 2019, EASA grounded the Boeing 737 MAX series by publishing their Emergency Airworthiness Directive 2019-0051-E (AD): Effective Date: 12 March 2019, 19:00 UTC  [...] ...
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5answers
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For what reasons might a taxiway be mistaken for a runway?

In this article, an airliner landed on a taxiway instead of a runway. What might be the reasons that a pilot can mistake a taxiway for a runway? (I mostly know the answer for this question, but I ...
14
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1answer
743 views

How does this test flight escape aparatus work?

I was watching this video about the test flight escape systems on a Bombardier flight. In the video, this machine is shown: The yellow box moves up and down in the video. Does it move up and flip the ...
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4answers
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How to do a Rapid Descent in a jet with inoperative spoilers?

So, let us assume you are in a simulator for your favorite jet plane, and the instructor gives you a LOFT (Line-Oriented Flight Training) scenario that goes as follows: A normal takeoff and climb to ...
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1answer
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Is there a minimum separation between a landing aircraft and another crossing its runway?

I have just seen this video of what has been called a runway incursion at LEBL (my hometown airport). A russian jet initiates a go-around after seeing an argentinian plane crossing runway 02: https://...
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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, ...
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Why are safety demonstrations done while taxiing?

In airliners, safety demonstrations are performed when the aircraft is leaving the gate. I understand it cannot be done latter as an aircraft incident including an evacuation may occur at take off ...
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Can tower clear aircraft for take off with traffic still on the runway?

How much separation is required after an aircraft lands before ATC can clear another aircraft to take off from the same runway? On longer runways are small aircraft allowed to commence take off roll ...
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1answer
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When did inflight smoking become (widely) prohibited?

Currently in my mid-'30s, I can still clearly remember the time when half of the plane's passengers were smoking throughout a long-haul flight. I know commercial flights became non-smoking sometime in ...
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Is A380's center of gravity really too far back?

I have searched and even studied plans from Airbus itself, but I was not able to confirm the following and would like to ask if the information I have is correct. TLDR version so you don't have to ...
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Where are the microphones for the black box located in the cockpit?

All modern commercial airliners have a CVR (Cockpit Voice Recorder) on-board to record what the pilots are saying during the duration for a flight. I feel that the location of the microphones is ...
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Can a Boeing 747 take off fully loaded on 3 engines?

Recently a Boeing 747 aborted a take off while still on the ground due to the failure of one engine. Can a Boeing 747 take off fully loaded on 3 engines?
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What is the requirement of a higher glidepath/approach angle and is this a flight safety issue?

To reduce noise in the London urban area, Heathrow airport has announced plans to trial a steeper approach for aircraft landing - changing from 3 to 3.2 degrees. If this is successful, they will ...
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Is all jet fuel the same? [duplicate]

I'm a Chemistry student preparing an in-class lab demonstration that involves the combustion properties of jet fuel used in typical US based airliners. Is all jet fuel the same, or do I need to ...
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Does the Airbus A350 have an Automatic Emergency Descent System?

In 2009 Airbus went public with a new feature in the Airbus A350, an Automatic Emergency Descent (AED) System. The system would detect a rapid depressurization and, after a defined waiting time, ...
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2answers
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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 ...
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What safety mechanisms prevent thrust reverser deployment in mid-flight?

I just came across the Wiki article on Lauda Air Flight 004, which was destroyed when a thrust reverser activated in mid-air. In the article, it says: The incident led Boeing to modify the thrust ...
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Is flying at 14,000 MSL safe for children without supplemental oxygen?

FAR 91.211(a) requires supplemental oxygen for all passengers above 15,000 feet. Are there any health implications of a 5 hour flight at around 14,000 feet on children without any supplemental oxygen?...
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How can air travel be so safe if the aircraft skin is only 1-2 mm thick?

Aircraft skin is not very thick at all, yet air travel is the safest form of travel. All aviation professionals know why, but most occupants of an airliner are not professionals. How can it be ...
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1answer
801 views

How does auto landing work?

Some aircraft are equiped with auto landing to assist on zero visibility and ceiling land. Actually, how does this system work?
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Do flight attendants do pinch-hitter training?

I was watching a Captain Joe video (Can a PASSENGER land a PLANE?) and he mentioned that he left out the 20 minutes it took the person to even figure out how to communicate with ATC. It seems to me ...
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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?
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How likely could there be a loss of cabin pressure?

You often on commercial aircraft (whilst on the ground to the runway) hear on the safety video: in the event of a loss of cabin pressure, oxygen marks will be released from the panel .... What ...
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2answers
735 views

Is it an acceptable practice to take off in a microburst?

This video has been posted on Youtube: Strong winds are blowing at the airfield, pilots are taking off aircraft to prevent them being damaged. However I noticed that gliders have been ...
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How does one determine if an airplane meets airworthiness directives?

There seems to be no way to determine if airworthiness directives for your airplane have been complied with. Does anyone know? I found this FAA website but you can type in a type of aircraft and ...
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Can delamination be detected early?

When a composite structure is hit, the impact causes shockwaves which travel through the structure, and cause delamination. Delamination reduces the strength of the composite structure and may cause ...
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1answer
336 views

Has anyone compiled all the NTSB accident reports and broke down the percentages for cause of accident and fatalities?

I am not talking the typical breakdown such as Pilot/Mechanical/Other, but rather, more specific things such as, engine failure, Stall/Spin on approach, controlled flight into terrain... etc
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1answer
324 views

Was there a historical requirement to announce altitude, temperature, etc?

It is a common experience of flying on commercial flights that pilots announce certain flying conditions, including altitude and speed. It has been previously asked on Aviation SE why pilots announce ...
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1answer
284 views

Do special procedures exist to limit pilot workload during pilot incapacitation?

Although pilot incapacitation is rare, the website avherald.com lists several occurrances of flight crew incapacitation, alone two events reported yesterday. FAA AC 25.1523-1 requires all aircraft ...
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Is this planned building in a runway approach legal?

A 50 story building is planned in Santa Clara, CA three miles from the SJC 12R runway end. Such a building is at least 500ft tall and many such buildings are 700ft or more, is this legal? Nothing ...
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1answer
255 views

What is the behaviour of ILS when there is an unmodulated interfering carrier signal?

Let us assume we have a localizer (identifier I-STK) transmitting at 110.10MHz and a matching glideslope at 334.40MHz. If a device aboard an aircraft tracking the I-STK ILS were to emit an ...
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2answers
199 views

What construction standards are used to increase impact survivability of passengers in case of a crash landing?

There are several equations on the site about effectivity of passenger seats and restraints, and how beneficial they would be in case of a crash landing: This question about lack of shoulder ...
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3answers
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Why is this video of a G36 Bonanza taking off so scary?

Why is this video of a G36 Bonanza so 'scary'? If they had clipped the top of the trees, would it really have brought the plane down? (And even if yes, it looks pretty ...
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1answer
261 views

Why isn't cabin air quality in airliners directly monitored with sensors?

Airliner air conditioning systems refresh the cabin air volume every couple of minutes. A portion of it is filtered and re-circulated into the cabin, however AFAIK there are no direct cabin air ...
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1answer
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Do large aircraft have carbon monoxide detectors?

Do big aircraft (e.g. Boeing 737 or Airbus 320) have carbon monoxide (CO) detectors installed in them? I don't know if the pressurized cabin means they aren't needed, but I do remember there are CO ...
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1answer
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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 ...
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Why do airlines not use direct routes?

Why do airlines use SIDs and STARs when flying IFR. Wouldn’t it be easier and make more sense for them to use direct routes (for example KDFW.KLAX instead of KDFW.L4D.ZIBIT.J5N.BUBIN.P3K.KLAX (not a ...
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Why is there no alert if shutting down a running engine during flight? [duplicate]

In reference to Flight 235, there is a lot of speculation going on today, and since the flight recorders' data indicate that the running engine was shut down manually, everyone is suspecting that ...
0
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1answer
296 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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2answers
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I just saw a plane drop off online radar; should I do anything about it?

I was watching Flight Radar 24, positioned near my house, to see what planes I could spot, and noticed a Cessna 550's transponder just dropped off @ 5,325 ft in a high-speed descent! Is there ...
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3answers
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Why is the seat belt mechanism on airplanes so different from the the one on cars?

You pull a flap on airplane seatbelts, you push a button on car seatbelts. Why?
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3answers
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How is it safe for helicopters and Ospreys to refuel in mid-air?

How do military helicopters like the Blackhawk and CH-53, as well as the V-22 Osprey, perform mid-air refueling without their rotor blades (periodically and accidentally) contacting the drogue or fuel ...
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2answers
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How to land the aircraft when the flight deck is full of smoke?

If a fire occurs in flight, the crew will likely try to land on a diversion airport. However landing presupposes seeing the primary instruments, switches and controls. Source In case the fire is not ...
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1answer
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Is there any limit on how narrow aisles can be?

Sometimes, when I'm flying on the airlines, I'll board an aircraft where the aisles seem incredibly cramped, where it's almost impossible to move past without bumping every seat. I can't imagine how ...
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1answer
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What does it mean when a runway's safety area is not standard?

If an airport has a NOTAM that states that a runway safety area is not standard, what does that mean? Here's an example. ...
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2answers
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What should a pilot do if they feel sleepy?

What should a pilot of any large commercial passenger airplane do if they feel sleepy? What is the maximum time per day during which the pilot may control the airplane ?
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1answer
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Why is a 0 kt, vertical climb in a helicopter not safe near the ground?

In the "Test Pilot" column in the July 2017 issue of AOPA Pilot, one of the questions was From reader David Franklin: If a given helicopter has a best rate-of-climb airspeed of 60 knots, its ...

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