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With Travel Halted, What Happens To The Planes?

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WattsThat:

--- Quote from: paulca on August 10, 2020, 09:24:45 am ---
--- Quote from: IanB on August 09, 2020, 06:17:13 pm ---
--- Quote ---which could result in a forced off-airport landing
--- End quote ---

I get the feeling this means "a crash"  :-\

--- End quote ---

Plausibly, but you'd be amazed at how far a full airliner can glide.... if it has altitude to do so.

--- End quote ---

No doubt you are referring to this example:

https://en.m.wikipedia.org/wiki/Gimli_Glider

Any aircraft that crashes in an uncontrolled fashion due to the loss of power is the very definition of pilot error. There is no excuse for losing control of an aircraft due to a loss of propulsion. Period. You do not stop flying the aircraft until it is no longer moving.

Aviate, navigate, communicate.

langwadt:

--- Quote from: Gyro on August 09, 2020, 05:40:32 pm ---
--- Quote from: Monkeh on August 09, 2020, 05:03:19 pm ---Also, this happens: https://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/0/ec0e5875b315e9e5862585ae007cd448/$FILE/2020-16-51_Emergency.pdf

--- End quote ---

From the Background section:

--- Quote ---This condition, if not addressed, could result in compressor stalls and dual-engine power loss without the ability to restart, which could result in a forced off-airport landing.
--- End quote ---
  :palm:


Presumably it's another one that applies to all those 737Maxs that have been sitting on the ground around the world for over a year now - probably not the only valve!

--- End quote ---

If you had read it you would know that it only applies to the 737NG not the Max, it has different engines


SeanB:

--- Quote from: Gyro on August 09, 2020, 06:06:30 pm ---I wonder how many 'Engine bleed air 5th stage check valves' Boeing have in stock!

--- End quote ---

Likely not many, the more important thing is how many can the manufacturer and the designated overhaul facilities overhaul per week, as those kinds of equipment are designed to be overhauled and repaired multiple times in their operational life.  The more worrying thing is that many of the parts will have time expired during this period, and will need to be taken out and replaced, plus the majority of these aircraft are being stored in far from ideal conditions, and with far from ideal preparation other than put covers on and tape up ports. you will find many will have unseen corrosion, and many will have failures almost immediately after being placed back into service.

Batteries as well are a worry, as they will have needed to be removed and stored in a battery maintainer that keeps them properly charged, but likely they are just left disconnected in the avionics bay at best, or have been left connected and thus have overdischarged to the point they are useless, or for the lithium ones, have dropped down to the point the controllers have deemed them unusable and failed them.

Going to be a lot of the older fleet going into scrap metal as well, at least those that are fully paid off, so that the scrap price, after salvaging all saleable parts for other aircraft, is more than the cost of scrapping them. You are also going to find a lot of lease aircraft in a quandry, not worth much any more, still under loans, and not able to earn income, plus every month the bill for storage increases. Going to be a lot of airlines closing and merging, and quite a few national carriers (the one here for instance) are going to either need massive government funding, or will be closed, restructured or sold off.

Friday was the first time I had seen any RJ's fly out of the airfields near me for some time, and there is a distinct lack of air traffic to the major airline as well, though there is still a fair amount of helicopter traffic, as most of it is for medical cases, and for military use.

Rick Law:

--- Quote from: jogri on August 09, 2020, 06:42:06 pm ---
--- Quote from: IanB on August 09, 2020, 06:17:13 pm ---
--- Quote ---which could result in a forced off-airport landing
--- End quote ---

I get the feeling this means "a crash"  :-\

--- End quote ---

No, this means a descent with descent rates that may or may not be fully approved for passenger flights by the airplane manufacturer, followed by a landing at a non-ICAO registered aerodrome. This procedure may be followed by an unscheduled rapid disassembly either during the descent phase or during the landing.

--- End quote ---
[RL: Bold added to quote]

Pardon my ignorance, what does "unscheduled rapid disassembly" means?  Is that some kind of airline lingo for the plane falling apart while descending for the landing?  If so, this euphemism totally obscure the reality here.

peter-h:
Ignore it; he's playing with you.

That valve jamming is potentially a loss of much or most of the engine power, which is bad news if it happens in both engines at the same time. Google BA038 for example.

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