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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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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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2answers
183 views

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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2answers
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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
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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
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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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2answers
186 views

Why does a pilot bank up to 5 degrees into the operating engine following failure of the other engine?

For Vmc condition, one of the solutions is to bank up to 5 degrees into the operating engine to increase rudder effectiveness to maintain control. Why is it up to 5 degrees? What happens if the pilot ...
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2answers
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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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2answers
523 views

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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1answer
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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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2answers
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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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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
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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
128 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.
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4answers
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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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1answer
656 views

In a Practice Forced Landing (PFL), what are Low Key and High Key and how are their locations determined?

Please explain what are "low key" and "high key" in practice forced landings? Are they any particular locations with respect to the airfield? Are they the same for every aircraft? Will they change ...
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2answers
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Could compressor stalls be caused by air in supercritical conditions?

It is likely that in compressors of jet engines appear conditions that cause the intaken air to become supercritical, cf Is the air in a jet engine supercritical? . Is it possible that ...
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Have there been any incidents caused by an inability to shut down an engine?

I read many items on the avherald.com site where it says "engine shut down during flight" or words to similar effect. I'm wondering if there are any instances where an engine could not be shut down ...
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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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Why does the A320 right aileron float on dual engine failure?

On this question for the A320 after dual engine failure it says: When the hydraulic power is lost, the right aileron is lost, and is in the upfloat position. Why would this affect only the right ...
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1answer
507 views

What is the relationship between EGT, Fuel Flow, N1, N2 and Air Temperature?

I initially wanted some sample data for EGT, Fuel Flow, N1 and N2 to build a prognosis system that predicts engine failure (ECTM). I searched for some sample data online but got to know that there's ...
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1answer
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Where can I find sample data required for Engine Condition Monitoring? [closed]

I'm trying to find some sample data required for Engine Condition Trend Monitoring to analyse and predict when an engine might fail. I went through a lot of research papers and (kind of) understood ...
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2answers
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Can current fighter jets perform a deadstick landing?

If a current modern day fighter were to have a total engine failure over a suitable landing site or airport, can the pilot safely perform a dead stick landing? If so, are they routinely given training ...
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1answer
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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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2answers
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Why isn't the application of “carb heat” in initial piston multi-engine failure emergency procedures?

What is the rationale for not including the application of carb heat in the initial multi-engine airplane's engine failure procedure? I've recently starting flying light multi-engine airplanes again ...
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1answer
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Was the safe landing of Southwest flight 1380 extraordinary or expected?

I've been reading with great interest and concern about the recent Southwest flight that resulted in the first fatality in that airline's history. There's one question I haven't seen answered, though:...
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What were the make and model of the engine that failed in flight Southwest 1380?

Regarding the tragedy of Southwest 1380 flight on 2018-04-17 involving an engine failure, what company manufactured that engine, and what engine model/type was it?
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What are the main sensor value that cause High pressure compressor fault in turbofan engine?

I have read the paper "Damage Propagation Modeling for Aircraft Engine Run-to-Failure Simulation" (Reference). I am doing analysis to find which sensors to monitor for the faults injected in the ...
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3answers
299 views

Does it help to climb in case of a partial engine failure?

When the engines of a airplane show irregularities that do not reduce performance but indicate a possible failure of the engines, is it useful to climb to a higher level, to increase the glide length ...
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4answers
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Can an airplane engine fire be extinguished without shutting down the engine?

Airplane engines catch fire from time to time (and are falsely reported as being on fire even more often). In a modern airliner, the "fire handle" shuts down the engine, closes the fuel pipe, and ...
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What could cause an engine shutdown on a Q400 with CDS codes 732, 907, 915 and 938?

A Bombardier Q400 displays error code 938 on the Central Diagnostics System(CDS), which is attributed to turbomachinery chip detector. An examination shows debris in the detector hitch which is ...
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How long can a passenger aircraft glide without engine power? [duplicate]

Assuming that the aircraft is cruising at 36000 ft and lost engine power, how long could a passenger aircraft glide?
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1answer
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What Caused the Engine-Failure of Southwest Airlines Flight WN-3472?

What caused the damage on Southwest Airlines Flight WN-3472? The inlet section of the engine is missing but the fan and nose-cone are still visible. Pictures taken during flight even seem to show ...
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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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2answers
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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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Is there any legitimate reason for adding momentary power when descending at idle with full carburettor heat on?

Scenario: While demonstrating a simulated engine failure emergency landing a flight instructor puts on carburettor heat and reduces the throttle to idle of a small single engine Cessna. After a couple ...
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Is it common for a cold reciprocating engine to stop at idle?

The other day I started the engine of a PA28 and put it at 1200 RPM as per the checklist but the sound didn't seem right - so I tried each magneto and the power dropped a lot on one of them. I then ...
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1answer
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How dangerous would it be to start a jet engine with coins inside?

With the multiple stories in the news of people throwing coins into a jet engine for good luck, I couldn't help but wonder how dangerous it would be if the act went unnoticed and the crew started up ...
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1answer
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if your Seneca weight is 4000 pounds , and you have 800m visibility, would you take off? [closed]

An examiner asked me if your Seneca weight is 4000 pounds , and you have 800m visibility, would you take off ? I said by law the visibility is ok but still I would not because if we get an engine ...
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Why should a Piper Seneca not take off after an engine failure below 100MPH?

In the Seneca (PA34-200) AFM, in the ENGINE FAILURE DURING TAKEOFF section, it is noted that if engine failures occurs during takeoff ground roll and 100 MPH has not been attained, the pilot must ...
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1answer
245 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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1answer
246 views

How dangerous would it be to take off at night with no ATC, no runway lighting system and have a single engine working?

I was wondering how dangerous it would be to have an engine failure (with a twin-engine) during take off at night when you have no runway lights (and no city close-by) and no ATC? Would using the ...
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How common is engine failure?

What are the failure rates for piston, turbine, and jet engines? (If more subdivisions of "engine" are necessary to make the data useful, please point them out).
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879 views

What is the glide ratio of a DA42?

I was looking for the best glide speed of a DA42 with both engines out, but it seems it's not in the POH. In the emergency checklist, it only mentions a speed of 85 knots to maintain on final approach ...
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3answers
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Why weren't the Airbus A330 engines designed with a system to stop their fans?

Why wasn't the Airbus A330 designed to stop its fans (with some kind of 'handbrake')? To clarify, I am specifically talking about the aircraft that flew Air Asia flight D7237. During the flight the ...
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2answers
284 views

Why use a single engine plane instead of a multi engine one for a long range flight record?

Tupolev ANT-25 was designed specifically for setting flight range records. In 1937 two flights from Moscow, Soviet Union to USA via the North Pole happened - one covered 9130 kilometers and finished ...
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How do helicopter pilots practice auto rotation?

How do helicopter pilots practice auto rotation, and specifically, the landing phase? Timing the flare as ground is approaching seems critical to a successful auto rotation landing. Yet I can't ...
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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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1answer
586 views

Triple engine failure; which would you choose to keep left?

It is well known that planes with two engines must be able to land with one engine inoperable for their certification, and that four engine planes with two inoperable. Now, suppose you had a four ...
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1answer
710 views

How long does a non-ETOPS flight need to be able to fly in an one-engine-out situation?

Let's say that you're in a 737, mid-cruise in a non-ETOPS situation, and you lose one engine. Are there any FARs governing how long you need to be able to stay airborne? Or is all that's required the ...