Linked Questions

56 votes
9 answers
58k views

Why are fuel tanks located in wings?

Passenger aircraft have fuel tanks in the wings. Why? What are the advantages and disadvantages of this location ? examples of disadvantages I would suspect: added weight increases the structural ...
summerrain's user avatar
  • 3,484
72 votes
6 answers
31k views

Why are fuel tanks in the wings filled first, and why are they used last?

When fueling airliners, why is fuel filled first in the tanks in the wings and then the center tanks? And why do they use fuel from the center tanks first and then from the tanks in the wings? From ...
lemonincider's user avatar
  • 7,565
26 votes
3 answers
9k views

How many flight hours do the first retiring A380s have?

I read news here that an A380 previously owned by Singapore Airlines has been decommissioned and scrapped. Another A380 from Air France was also retired. Others are nearing retirement as well. But it ...
AirCraft Lover's user avatar
20 votes
3 answers
6k views

What percentage of airplanes are involved in a crash in their lifetime?

The chances of a commercial flight crash are about 1 in 1,200,000 - pretty low. If each plane makes about 40,000 flights in it's lifetime, about 1 in 30 airplanes will be involved in a crash before it ...
Tim's user avatar
  • 480
13 votes
6 answers
15k views

What limits the lifespan of helicopters?

The lifespan of aircraft is generally limited by metal fatigue. This is true for fixed wing aircraft; is it also true for helicopters? What is the determining factor for helicopter useful life?
vasin1987's user avatar
  • 8,132
11 votes
2 answers
22k views

What is the ratio between time in the air and time on ground for an aircraft?

I suppose it may be different from an airline to another. Given the maintenance, the time to load/unload the aircraft, the time the aircraft is grounded because there is no flight scheduled (e.g. at ...
Manu H's user avatar
  • 16.5k
8 votes
2 answers
999 views

What is the lifespan of a level D simulator?

We have a few interesting questions about the normal ways aircraft end their lives. What about simulators? How long do they typically last? What is the typical reason for retirement? I am ...
Anonymous Physicist's user avatar
3 votes
3 answers
4k views

What is the fatigue life of a fuselage based on?

The fatigue life of the fuselage is based on the number of what? Pressurization cycles?
KM320's user avatar
  • 349
7 votes
1 answer
3k views

When do the Boeing 737 Next Generation aircraft reach End-of-life?

When can we expect the Boeing 737 Next Generation aircraft to reach End-of-life / stop flying? The Next Generation is the name given to the −600/-700/-800/-900 series of the Boeing 737 airliner.
Meatball's user avatar
  • 430
1 vote
1 answer
4k views

How many total airframe cycles should a B737-400 be put through before it becomes too costly to maintain?

I know maintenance can extend the lifespan of an aircraft but when looking at large aircraft such as the 737-300/400 is there a standard amount to go by?
mark1212's user avatar
2 votes
2 answers
526 views

How could a 45 years old DC10 be still in service with one of the largest cargo airline?

It is amazing to see this 45-year-old DC10 freighter still operating for FedEx regularly: I know the lifespan of an aircraft is not rated by ages but flight cycles, but an actively used DC10 over 45 ...
Li Brandon's user avatar