Questions tagged [engine-failure]

An engine failure occurs when one or more engines on an aircraft stop functioning normally. This is often assumed to mean a complete loss of power from the engine, but partial power loss and excess power are also engine failures.

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211 views

How controllable is the 737 in single-engine manual-reversion flight? Is it controllably landable (or go-around-able) in this condition?

The 737 is practically the only civilian jetliner still in production1 to have provisions for flight-control manual reversion; in the event of a total failure of the A and B hydraulic systems, the 737’...
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Why “Throttle…Open 1/2 travel” on engine troubleshoot checklist?

Why do some engine troubleshoot checklists (on small single engine piston aircraft) call for throttle to only be open 1/2 travel? I suspect it has something to do with modern fuel injected engines, ...
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Was it ever considered to optimise a jet to normally operate with one engine shut off?

As I understand it, the current trend to reduce all commercial aircraft to no more than two turbofans has long-relevant reasons – the more engines, the higher the fuel consumption – and earlier jets ...
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Can a tiltrotor fly safely with one engine?

I am curious about tilt-rotor feasibility (such as AW609) against fixed-wing and rotor-blade aircraft (conventional helicopters). One important issue that immediately arises in my mind is that both ...
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In an engine failure, should I expect less range than with the engine in idle?

I fly a C172 (fix pitch propeller) and when my instructor and I practice a simulated engine failure, we do not turn off the engine, instead we set the engine to idle. In an actual engine failure, ...
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Can the APU provide emergency thrust?

By David Monniaux (Own work) [GFDL, CC-BY-SA-3.0 or CC BY-SA 2.0 fr], via Wikimedia Commons Many larger airplanes have gas turbine APUs (auxiliary power units). It seems that their exhaust is ...
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How does retracting flaps help extend the glide of an aircraft?

As per the video from Smithsonian channel BA flight 38's captain retracted the flaps of the Boeing 777 by 5 degrees to extend glide, to travel further. Why?
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Why are the rudders of quadjets sized to accommodate for a sudden failure of a single engine, rather than two on one side?

For all multiengine jets, the rudder is required to be large enough to allow directional control of the aircraft to be maintained in the event of a sudden failure of one engine, with the other(s) ...
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Can the Airbus A380 safely fly with two engines out on the same wing?

I know twin-engine jets can safely take off and fly with one engine out (i.e. all thrust only on one side). Of course quad-engine jets are also able to fly safely in case one engine is out. But is ...
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326 views

What is the typical procedure if an engine fails during a vertical takeoff?

My understanding of VTOL aircraft (correct me if I am mistaken) is that the plane accelerates vertically until it's a bit off the ground, at which point the thrust is slowly vectored horizontally, and ...
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1answer
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Can APU start in-flight using RAT or battery power?

Is it possible for a passenger jet to start its APU using power from the RAT? If so, are there plausible benefits to doing so (like supplying hydraulic pressure to the wheel brakes)? Do modern ...
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Will the landing gear work mechanically in case of total power loss?

In case of a total power failure in all the aircraft systems like engine failure and APU failure, would it be possible to use mechanical means (manually) to open the landing gear bay door and deploy ...
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1answer
326 views

If an A320 loses an engine why does the landing category go to CAT3 single?

Following an A320 engine failure, why does the the landing category go to CAT3 single even if the APU has been started and is powering the AC bus that was lost by the failed engine?
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Are jet engines designed in a way to make an explosion result in the least damage possible?

I know most engines are super reliable today, but do manufacturers do anything to at least make an explosion result in the least damage possible?
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1answer
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Why was there no thrust from the engines in the TACA Flight 110 incident?

I have just watched Mayday episode 11, season 11, "Nowhere to Land" about TACA Flight 110 incident. Most key issues of the incident are clearly explained in the episode: Why both engines turned ...
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Why could a Rotax 914 light aircraft lose power at 7000 feet?

I was flying an RV 4 equipped with Rotax 914 engine and variable pitch propeller. The problem was observed during flight above 7000 feet; vertical speed became 0, RPM overshoot for 2, 3 seconds to ...
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Why would engine fire cause loss of control?

I was wondering why engine fire would cause of loss of control or crash. There is loss of power and even drag. But could some expert please expand on the troubles of a engine fire?
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Why are movable rocket thrusters not used in airplanes?

If an engine fails in a passenger airplane, why can't it have movable rocket thrusters in the wings to help safely land the airplane?
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Why isn't there a procedure for dual-engine failure in twin-engine airplanes?

I'm licensed to fly multi-engine aircraft. I currently fly the DA-42NG. However, nowhere in my training and in the official POH was I introduced to procedures for handing a dual-engine failure in-...
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Have there ever been any accidents within holding stacks?

At a busy airport, up to a dozen aircraft waiting to land may fly the same holding pattern at the same time, separated vertically by 1,000ft. — a stack. Some ATC towers have dedicated Stack ...
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1answer
267 views

Is there any mechanism in engine mount to prevent shock loads on engine while landing?

How engine is mounted in wing is restricting motion in any direction but is it still resistant to shock loads, or is there any mechanism inside engine associated to bearings that will absorb shock ...
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Does a windmilling propeller create more drag than a stopped propeller in an engine out scenario?

For this question lets assume that we are talking about a fixed pitch propeller and not a variable pitch propeller. I do understand that variable pitch props should be feathered during an engine ...
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Why do uncontained engine failures still occur?

One of the absolute requirements of an aircraft turbine engine (usually some sort of turbofan or turboprop) installation is that, in the event of a destructive failure of the engine, the engine ...
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Can fighter aircraft glide?

In case of engine failure, do the fighter jets have such a stable airframe so that they can glide their way through to the nearest landing strip (As it happened in the case of Gimli glider)?
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Why does a pilot bank up to 5 degrees into the operating engine following failure of the other engine?

If a multi-engine aircraft suffers an engine failure while near minimum control speed (Vmc), one of the solutions is to bank up to 5 degrees into the operating engine to increase rudder effectiveness ...
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315 views

Does one-engine cruise consume less fuel than two-engine cruise?

Scenario 1. A two-engine airliner experiences rapid depressurization and makes an emergency descent to 10,000 ft, and diverts to the nearest airport. Scenario 2. The same two-engine airliner ...
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Why would a pilot use ailerons for countering asymmetric thrust in mid-flight?

A inexperienced 747-400 pilot used ailerons for counteracting asymmetric thrust in 1998 aboard United Airlines Flight 863 (YouTube recreation). Why would an airline pilot do such a mistake? Why would ...
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1answer
202 views

What is the source of emergency power for a 727?

I've found a couple of sources that state the 727's APU cannot be started while flying, as it draws air from the wheel well. It drew air from inside the wheel well, so it was only for use on the ...
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Why should you not turn in the direction of an inoperative engine?

In two-engine aircraft with wing-mounted engines when one engine quits the aircraft will have a natural tendency to turn to the dead engine. So if you need to turn, it seems logical it should be ...
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Does engine failure shut off the auto-pilot?

After answering this question it got me wondering whether there can be a situation where a complete flameout of engines could cause a serious loss of control if the auto-pilot were to continue to try ...
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B777- In emergency mechanical back up how does the flight controls manage engine failure

In case of engine failure above the ocean with multiple electrical failures and after having exhausted the batteries the fly by wire mechanical backup with available hydraulics if left with the THS ...
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1answer
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How does an engine failure affect the flight of an airplane?

I'm not even close to an aviation enthusiast, but after watching some videos I found I have a deep misunderstanding on how airplanes work. . I've seen many cases where one of the engines fail and ...
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For how long can an Embraer E195 airplane glide at malfunction?

E195 specs: Maximum Takeoff Weight 52,290 kg Max Cruise Speed M 0.82 Cruise altitude: 35000 feet Assume the weather condition is perfect (no clouds or gust winds). Also assume this airplane is fully ...
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Are there any aircraft where minimum-V1 is limited by Vmcg?

V1, unlike all the other Vspeeds, is not rigidly determined by the laws of physics, the aircraft’s specific abilities, and the conditions of the particular takeoff being attempted,1 but is, rather, ...
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1answer
470 views

Could the Olympus 593 have been windmill-restarted during supersonic flight?

The Rolls-Royce/SNECMA Olympus 593 (which powered the Concorde) used a complex intake-ramp system to improve the engine's efficiency and prevent an engine shutdown or failure during supersonic flight ...
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1answer
269 views

How is health monitoring of large aircraft engines and components done?

How is online (in-flight) and offline (between flights) health monitoring of large aircraft engines and other essential components done? As far as I have been told, there are a lot of measured ...
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273 views

Do a turboprop’s compressor and turbine rotors windmill when the engine is shut down and feathered?

If a jet engine is shut down in flight, it continues to turn due to the aircraft’s forward motion forcing air through the engine, causing it to “windmill” in the airflow. Is this also true for ...
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1answer
161 views

What happens if full collective pitch is suddenly commanded on most modern helicopters?

Related, but not the same: What happens when you apply full cyclic + collective? If the pilot suddenly applies full collective pitch on a turbine powered helicopter, will the engine stall? It seems ...
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Does an A320 revert to Direct Law if both engines flame out?

In the case of a flame-out in both engines on the two-engine A320, does the aircraft revert to Direct law or does it maintain Normal Law? An example is US Airways 1549 (the landing on the Hudson).
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Is autorotation possible in a tandem rotored helicopter?

I just wonder, whether a synchronized autorotation is possible in case of turbine failure (one or both gas turbine engines). All Gearboxes obviously must turn not to desynchronize -> lethal
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1answer
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Do commercial flights continue with an engine out?

Do commercial flights continue with an engine failure? If you look closely at the attached picture it seems that one of the engines has a much smaller contrail than the other three. This seems to ...
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1answer
2k views

What is the A320's procedure for dual engine failure at very low altitude?

What is the procedure for a dual engine failure in an Airbus A320 (perhaps a large bird strike, since these engines only tolerate medium birds) at a very low altitude, shortly after takeoff (approx 1,...
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1answer
401 views

Can Ospreys land without running engines?

I just have seen a video of a demonstration of an Osprey V-22. While this is an impressive aircraft I wonder whether this might land with failing engines (with the large "propellers" probably hinder ...
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Why would one want to slow to V2 following an engine failure during takeoff?

Reading about the crash of American Airlines Flight 191, the proximate cause of the final loss of control was the pilots' reduction of the aircraft's airspeed to V2, in compliance with the published ...
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Why do jet engines sometimes spit out flames after ingesting birds?

After seeing this video of a 757's engine catching fire because of a bird, I wonder: What happens to the engine? Why does it periodically exhaust fire? Is this some safety feature?
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Why are all engines identical in typical commercial airplanes?

I come from the IT world where redundancy is in place to cover several cases, among other: a statistical failure of a device (so we use more of them expecting that the event is independent) a rogue ...
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1answer
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What are the reliability statistics for modern jet engines?

What is the actual numerical reliability statistics of the modern, large-aircraft, commercial turbofan engines available today? e.g. How many running hours can we expect a failure after? Are there ...
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2answers
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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
222 views

Why is there a minimum altitude for at least some high-speed jet engine restarts?

While reading this other question about envelope constraints for jet-engine restarts, I noticed something odd in the graph provided (of the relight envelope for the Honeywell HTF7000 medium-bypass ...
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1answer
309 views

How can you calculate the vertical speed of an helicopter during auto-rotation?

How can I calculate velocity of a helicopter when it falls with autorotation when the engine fails, given all the parameters such as mass , height , wing size etc.