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Total Cycles/time  
User currently offlineAtlasAir From United States of America, joined Jun 1999, 119 posts, RR: 0
Posted (13 years 8 months 1 week 14 hours ago) and read 2252 times:

hi,
can anyone tell me where I can find info on an aircraft total cycles or time.

I've heard that when an aircraft reaches a total time or cycles they must be retired. Well I was wondering what those figures were.

like for 747's and smaller aircraft

When is an aircraft too old to fly?

Thanx in advance
Atlas Air

3 replies: All unread, jump to last
 
User currently offlineBoomer From United States of America, joined May 1999, 102 posts, RR: 0
Reply 1, posted (13 years 8 months 6 days 21 hours ago) and read 2204 times:

I know of no mandatory retirement age, flight hours, or cycles for any common aircraft. The decision to retire a particular aircraft is purely economic...how much is it costing to keep airworthy? There are several DC10 and B747 aircraft that have accumulated well over 100,000 flight hours. Several DC8 and some B737 aircraft are pushing their way to this threshold also. It is conceivable that some of the Ex-American and Ex-United DC10's being converted to freighters by FedEx will end up seeing over 200,000 flight hours before they hit the scrapyard.

User currently offlineTom2katie From , joined Dec 1969, posts, RR:
Reply 2, posted (13 years 8 months 6 days 17 hours ago) and read 2204 times:

Many aircraft do have time and cycle limits, some of which do mandate retirement of components which may make it economically impossible to continue the aircraft in service. The Twin Otter has life limited wings. At 35,000 hours (or less for the 100/200 series), the wing boxes and mainframes must be replaced. Many operators choose to do this as there is no life limit on any other airframe component and the aircraft is not replaceable. At 40,000 cycles, 100 series Dash 8s must be sent back to the factory for extensive structural and fuselage bonding work, which is extremely expensive. Many operators choose to sell these aircraft prior to reaching this time limit. I would agree, however, that I have never heard of an airframe itself that is life limited. Most can be continued in service with a certain amount of inspection and repair.

User currently offlineJETPILOT From United States of America, joined May 1999, 3130 posts, RR: 29
Reply 3, posted (13 years 8 months 6 days 16 hours ago) and read 2194 times:

Every single plane ever made has a design life limit.


Some of the design life limits are as follows:

747 20,000 cycles, 60,000 hours, or 20 years

767 no cylce limit, 100,000 hours, or 40 years

A300/310 36,000 cycles, 60,000 hours, or 20 years

L1011 115,000 cycles, 210,000 hours, or 20 years

DC10/10/30/40 42,000/30,000 cycles, 60,000 hours, or 20 years

The life limit of an airframe means that the airframe has been tested to these limits in simulation. Known issues found during testing have been dealt with and airworthiness directives issued. From what I understand the manufacturer must implement a maintenance program approved by the FAA to extend the life of the plane past the proven life limit.

The fleet leading planes in hours as of 07/99 are as follows:

747: 111,594
767: 66,920
L1011: 82,891
DC10: 106,743
A300: 53,419

JET


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