Questions tagged [safety]

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

Filter by
Sorted by
Tagged with
5
votes
0answers
95 views

Why was the minimum turbulence intensity that commercial airliners have to withstand increased?

From 50 fps turbulence intensity at VC to 90-100 fps turbulence intensity at VC. The amended FAR design criteria was introduced in 1980 or 1981 for commercial airliners. What prompted this change?
2
votes
1answer
142 views

What is the minimum runway surface friction coefficient?

After calculating the friction coefficient for an asphalt runway pavement through a test, how to know if it’s acceptable or not? In other words, hat is the lowest acceptable value for friction ...
1
vote
1answer
142 views

Why do planes not employ a non-technological banking indicator? [duplicate]

I apologise if this is a very daft question with an obvious answer. I've been enjoying Air Crash Investigation episodes and there have been a few where the pilots, through differing training or faulty ...
1
vote
2answers
120 views

Are the turbulence reports by pilots via PIREPs used by other nearby aircraft or air traffic controllers to modify operations in any way?

I know the pilots are required to report turbulence experienced in the aircraft via PIREPs. The data for turbulence with lat,long,alt and the severity is available. I am wondering if the PIREPs are ...
0
votes
1answer
84 views

What kind of weather conditions would produce turbulence with an intensity of 90 feet per second?

This is the official documentation that we found regarding current commercial airplane design criteria; https://www.law.cornell.edu/cfr/text/14/25.341 It says the criteria for continuous turbulence is ...
0
votes
1answer
58 views

How does an airline develop a Safety Management System (SMS) program? [closed]

How does an airline develop an SMS program? Like from the ground up. And who does it involve? Does it involve regulators? I know the 4 pillars but who does it involve?
3
votes
1answer
198 views

On a Gulfstream jet checklist, do you do the walkaround before or after disengaging the gust locks?

On a Gulfstream jet checklist, do you do the walkaround before or after disengaging the gust locks? With small planes we generally remove the gust locks as we do the walk around, but with a larger jet ...
13
votes
9answers
7k views

Were propeller airplanes significantly more “scary” to fly in compared to modern jet ones?

I've flown exactly once in my life. It was in 2004, with a commercial jet. Not a "jumbo", but a normal-sized jet plane in common use for cheap flights in that year. (Well, twice if you ...
5
votes
1answer
787 views

When is it appropriate to foam a landing strip? (example JB292)

Background: I recently watched the Channel5 documentary on JetBlue 292 with their famous sideways landing gear. At around the 8:00-mark you see footage of the actual landing: Main landing gear intact ...
13
votes
1answer
256 views

Has a passenger's consumer electronic device ever actually caused a crash?

Most of us are familiar with the standard warnings and regulations against passengers using electronic devices (at all during takeoff and landing, and in some cases throughout the flight). This is ...
-2
votes
3answers
177 views

Why is it safe flying in a tailwind when taking off is not? [duplicate]

If taking off in q tailwind is unsafe (due to loss of lift from reduced air speed), then why is it safe flying in tailwind, such as in jet stream?
2
votes
1answer
479 views

Have there been accidents involving flight simulators?

Have there been any accidents which have happened to/in flight simulators? I understand that simulators are used to simulate general accidents for training purposes (engine failure, birdstrikes etc), ...
31
votes
4answers
10k views

Do Flight Simulation Instructors stop the simulator before a simulated crash?

There has been quite a lot of debate in healthcare simulation communities around whether or not to allow a simulated patient to die during training because it might negatively impact the intended ...
7
votes
1answer
1k views

How to safely handle AVGAS (100LL)?

Obviously 100LL is risky. It's got lead in it, so there's going to be some danger. But is it possible to not get lead into my system when I start flying? It is, for obvious reasons, something I wish ...
2
votes
1answer
269 views

What stops Germanwings 9525 happening again — a suicidal pilot crashing the plane?

I'm unpersuaded and still afraid, after reading What safety rule replaced the now-rescinded two-person rule (after Germanwings 9525)?. What's to stop or prevent another lone suicidal pilot from ...
11
votes
2answers
845 views

How often is the fuel sampled in turbine aircraft?

In planes using avgas, sampling fuel from the tanks is generally done before every flight, or at least before the first flight of the day and then after any refueling. This is done because water ...
-4
votes
1answer
197 views

Why did Boeing choose for a solution as aerodynamically invasive as MCAS to solve a much less safety related issue? [closed]

Why would Boeing, or anyone, ever jeopardize the aerodynamic integrity of an airliner, just to change the way a pilot feels the controls? The more I learn about it, the clearer it becomes that that is ...
1
vote
5answers
291 views

In theory, can jetliners remain controllable after losing the entire tail section?

The scenario here is a detachment of the tail,one with the whole empennage. Could a variant of an existing model of swept winged jet airliner be made to remain controllable, using ailerons, ...
22
votes
1answer
2k views

What makes a jet single pilot certified?

Why are some small-ish jets (Embraer Phenom 300, Pilatus PC-24 for example) single-pilot certified? The pilot still has to fly+navigate+communicate. Why would a small jet be more manageable than a ...
4
votes
1answer
315 views

Is it safe to use a propeller plane to fly commercially over the Tibetan Plateau?

I saw this youtube video today: Flying over Mt Everest. A lovely view of stunning nature - quite spectacular. However, I looked up the plane - or at least what I think is the plane - and found that it ...
2
votes
4answers
506 views

Engine out over a mountain road. Do you land upwind or up hill?

You're flying solo in a late-model, fixed-gear Cessna 172 with half-full fuel tanks. You are at 1000 feet AGL, 100 knots indicated, directly above the middle of a 2000 foot long straight section of ...
16
votes
8answers
6k views

Could an airliner exceed Mach 1 in a zero-G power dive and safely recover?

(I looked for duplicates. I really did.) Being as it is that "safety" and this are mutually exclusive: I am stupid. I take a cruising A320, apply TOGA power, and push zero Gs until I exceed ...
5
votes
3answers
335 views

Helicopter mast bumping in low g condition

The helicopter shown in the concrete pouring video seems to taking off from a hill and descending down in a way which can be classified as low G with low rotor loading. Although, the helicopter is ...
9
votes
2answers
952 views

What does “the other's right” refer to in 14 CFR Part 91.113?

There's a part in 14 CFR Part 91.113 (regarding airborne right-of-way rules) that's been confusing me: Converging. When aircraft of the same category are converging at approximately the same altitude ...
0
votes
1answer
174 views

How does ATC handle a controller with psychological trauma?

I've finally got around to watching Breaking Bad, (spoiler alert) in the last episode of season 2 a bereaved ATC controller accidentally causes a mid-air collision. I am not asking whether the actual ...
2
votes
3answers
159 views

Dangers to the Engine if CHT goes below minimum in flight during descent?

What are the dangers of CHT going below minimum in flight during descent since the power setting will be around 10inches in a power descent?
1
vote
1answer
133 views

In wing design, how is factor of safety related to G-limits?

What does factor of safety mean with regard to the maximum G force an aircraft is rated for? Does a rating of 3Gs mean the same as a safety factor of 3? Or is there some extra margin?
5
votes
1answer
340 views

Why are you not allowed to use power sockets in the seats during takeoff and landings?

Is it because the extra strain on the electrical system reduces engine performance?
2
votes
1answer
145 views

Why are even drone flights prohibited due to the earthquakes near Mt Keilir, Iceland?

A "swarm" of over 20,000 earthquakes has rocked Iceland in the past 10 days — and it could spark a volcanic eruption links to this tweet by Almannavarnadeild ríkislögreglustjóra; The ...
56
votes
8answers
11k views

Why don’t airplanes use turn signals?

Why don’t airplanes use turn signals like cars do? Would this improve safety for ground operations at uncontrolled airports? Could a similar concept be used to indicate in air maneuvers? For example: ...
30
votes
1answer
5k views

How do airports detect drones?

Recently, there's been a lot of coverage in the news of drones disturbing operations at airports. Do airports have a method to detect drones? If yes, how does it work? If it's still an emerging ...
3
votes
1answer
191 views

Modern airliners are designed to be able to withstand the worst (vertical) turbulence. But what about the rarer lateral (horizontal) turbulence?

'Extreme' turbulence is a derived vertical gust velocity of >3,000 fpm (50 fps) that causes a vertical G-load of >3. The limit turbulence intensity for a modern day airliner is 90 fps. (there is ...
0
votes
1answer
104 views

Is flap-asymmetry protection on airliners still active even on the ground?

On aircraft with flaps, a general certification requirement is that it must not be possible for the aircraft to suffer a loss of lateral control secondary to an asymmetric-flap condition. This ...
0
votes
3answers
185 views

Why do we take off with maximum power settings?

In most GA prop airplanes, take-off is executed with full throttle and high rpm. The usual reasoning is that this way, we leave the first few hundred feet, where failures are most severe, behind as ...
1
vote
0answers
77 views

What is the relation between cargo smoke and EDTO?

I have heard a lot of people discussing about cargo smoke and Extended Diversion Time Operations (EDTO) together. Just want to know how these two affect each other.
0
votes
2answers
299 views

Why are these 3 planes so close?

I spotted these three planes flying east then turning south. They were over the Hopi reservation and heading toward Winslow, AZ at 10:42 AM local time (MST), today February 5 2021. They were at 15k ...
-3
votes
1answer
167 views

Why is scud-running necessarily dangerous? [duplicate]

(Disclaimer: Please do not take the below as an endorsement of scud-running.) Scud-running is when a pilot flying in poor weather operates their aircraft at a lower-than-normal height above terrain in ...
1
vote
2answers
236 views

What is the maximum momentary G force that a modern airliner's wing can take before it snaps in extreme turbulence?

Taken from an aviation safety pdf.. Intensity - LIGHT - Vertical acceleration (g) 0.20-0.49 - Derived Gust (fpm) 300 -1,199 Intensity - MODERATE - Vertical acceleration (g) 0.50-0.99 - Derived Gust (...
-5
votes
1answer
159 views

Why didn't the airlines try to start copying SpaceX by putting camera on the outer body of the airplane? [closed]

This week my country Indonesia just had an Airplane crash accident Sriwijaya Air SJ182. I'm getting sick with people speculating why or how the plane crashed. Well, we can wait for the black box ...
17
votes
5answers
6k views

Why aren't “fuel polishing” systems removing water & ice from fuel in aircraft, like in cruising yachts?

Should you sump fuel tanks when the fuel system is below freezing? the question should one sump fuel-tanks before flying, if in freezing-conditions? but this implies another question that boggles me:...
6
votes
3answers
2k views

People say that modern airliners are more resilient to turbulence, but I see that a 707 and a 787 still have the same G-rating. Why is this?

The 707 was introduced in the late 50's, the 787 in 2009. Back when Air France 447 had recently gone missing, many were speculating that the aircraft had broken up in the turbulence associated with ...
-5
votes
2answers
187 views

How dangerous are tailwind gusts for STOL aircraft?

If I fly close to stall speed with a STOL plane and gust of 20kts tailwind comes at me,it will cause sudden reduction in lift ,becuase plane has inertia so it can not accelerate instantly. How ...
5
votes
1answer
152 views

How can I tell if a rental aircraft has been maintained in good condition?

When I rent a Cessna (typically old) from the local airport, how concerned should I be that the plane may have been abused at some points over many years (over-load forces, hard landings, over-rev'd ...
8
votes
5answers
4k views

How much do you have to respect checklist order?

In a fighter aircraft, if the checklist says turn on the radar then turn on the Heads Down Display, and the pilot turns on the HDD first would he be reprimanded for that if it makes no difference? Is ...
-2
votes
4answers
260 views

Why can't we use bleed air instead of oxygen cylinders? [closed]

When cabin is depressurized due to some or the other reason then we usually have oxygen generators in airplane and they last for 12 minutes. It is very shot in usual terms but it is enough to descend ...
2
votes
2answers
245 views

Reason why heavy aircraft are allowed to land but not to start

I stumbled upon this article (German) It says that a few of Lufthansas 747 are grounded at Twente airport. They were parked there because of COVID-19 at an aircraft recycling company. Now the airport ...
0
votes
0answers
38 views

What are the safety events definitons for Flight Operations Quality Assurance (FOQA)?

I am searching the definition and parameters of safety events which are used in Flight Operations Quality Assurance (FOQA). I tried searching by myself but I can't find anything valuable. Are this ...
0
votes
1answer
103 views

Are there any characteristics of a hypoxic flight? [closed]

Any patterns that investigators look for? For example, what happens when the engine flames out? is it guaranteed to enter a high speed dive? And would this affect certain parts of the aircraft, ...
4
votes
0answers
78 views

Is there a standard for required repainting of worn runway markings? In USA

Is there an FAA regulation or advisory circular covering the allowable wear, fading, or weathering of runway markings? I can find many FAA standards for the paint of fresh new runway markings, but I ...
2
votes
1answer
152 views

I have an idea about how to resolve a conflict between the pilots and an automated flight control system. Does it make sense? [closed]

I am thinking about the 737-MAX crashes. There is a similar question at Is it common for automated control systems to use non-redundant sensors? There was an article in yesterday's Seattle Times In ...

1
2 3 4 5
21