pavlin
Posts: 391
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How Many Flight Hours?

Sat Dec 10, 2005 12:03 am

How many flight hours do airliners (average) have before they get scrapped? 20000 or more? How often are engines replaced? 5000 hours?
 
Tristarsteve
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Joined: Tue Nov 22, 2005 11:04 pm

RE: How Many Flight Hours?

Sat Dec 10, 2005 12:25 am

I'm sure you will get some longer times but a TAT F28 flew 100000 hours, and a similar nbr of cycles before being scrapped.
Modern engines last a lot longer than 5000 hrs. An Icelandair RB211-535 amassed over 32000hrs on the wing, and I believe the record for a CFM56-3 is 34000hrs.
 
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HAWK21M
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RE: How Many Flight Hours?

Sat Dec 10, 2005 1:05 am

The Design Economic life of A320/B737 would be 75,000 Flight hrs,51,000 cycles or 20 yrs Average.
[not exact but approx]

regds
MEL

[Edited 2005-12-09 17:07:44]
I may not win often, but I damn well never lose!!! ;)
 
MrChips
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RE: How Many Flight Hours?

Sat Dec 10, 2005 4:30 am

Quoting Tristarsteve (Reply 1):
and I believe the record for a CFM56-3 is 34000hrs

And I might add that the engine in question was only replaced because of a change in the lease contract.
Time...to un-pimp...ze auto!
 
pavlin
Posts: 391
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RE: How Many Flight Hours?

Sat Dec 10, 2005 7:01 pm

34000 HOURS thats more than 1300 days. How can it be. Did it fly nonstop or what
 
kaddyuk
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Joined: Thu Nov 08, 2001 1:04 am

RE: How Many Flight Hours?

Sat Dec 10, 2005 8:50 pm

Quoting Pavlin (Reply 4):
34000 HOURS thats more than 1300 days. How can it be. Did it fly nonstop or what

It means that the engine spent 34,000hrs running... thats not a constant running of the engine, you have to take into account the number of cycles as well... Its not just the number of hours on an airframe that needs to be taken into account but the number of cycles as its the cyclic loading of an airframe which reduces its life.
Always think "Do i *NEED* to start the APU or will Ground Power suffice? Do I NEED to perform a full power test or will a Dry run satisfy the test requirements? Stopping and Starting an aircraft are the most stressful times on the airframe and should be kept to a minimum.

Most high utilisation aircraft will fly for upwards of 20hrs per day (allowing a 2hr turn round in each city). This means that most aircraft are capable of flying 7,300hrs per year. Its actually a number closer to 5,000hrs per year taking into account down time for maintenance and delays etc etc. Over a 20 year period this means that an aircraft will spend 100,000hrs flying. Thats a whole lotta time...!
Whoever said "laughter is the best medicine" never had Gonorrhea
 
113312
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Joined: Sat Apr 16, 2005 9:09 am

RE: How Many Flight Hours?

Sun Dec 11, 2005 3:56 am

I've flown Boeing 727s that have over 75,000 hours on their airframes. They were originally designed for a 30,000 lifespan. There are widebody airliners flying today with over 90,000 hours.
 
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Starlionblue
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RE: How Many Flight Hours?

Sun Dec 11, 2005 11:49 am

Quoting HAWK21M (Reply 2):
The Design Economic life of A320/B737 would be 75,000 Flight hrs,51,000 cycles or 20 yrs Average.
[not exact but approx]

That last word says it all. If the plane flies long segments in the desert, extend the life of the plane. If the 737 is with Aloha Airlines and does short interisland hops in salty air, cut the time in half...
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
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HAWK21M
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RE: How Many Flight Hours?

Sun Dec 11, 2005 7:14 pm

Quoting Starlionblue (Reply 7):
Quoting HAWK21M (Reply 2):
The Design Economic life of A320/B737 would be 75,000 Flight hrs,51,000 cycles or 20 yrs Average.
[not exact but approx]

That last word says it all. If the plane flies long segments in the desert, extend the life of the plane. If the 737 is with Aloha Airlines and does short interisland hops in salty air, cut the time in half

True the Environment it operates & level of Mx contributes too.
regds
MEL
I may not win often, but I damn well never lose!!! ;)

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