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Aviation glossary

Service life

Also: design service goal, design life, limit of validity, structural life

Manufacturing and maintenance

The period of use, measured in cycles, flight hours and years, over which the manufacturer has shown that an aircraft's structure withstands fatigue.

What it is

To establish it, the manufacturer puts a complete airframe that will never fly through far more load and pressurisation cycles on the ground than it would see in service. The results set the design service goal and the programme of structural inspections. Regulators also require a limit of validity for that engineering data, which can be extended through further testing and analysis.

In practice, most airliners are retired for economic rather than structural reasons: they burn more fuel than newer types, an expensive heavy check is looming, or their parts are worth more separately. Many leave passenger service at between 20 and 30 years old, though some fly on for much longer, often as freighters, and a few DC-3s built in the 1940s are still flying.

On Vuelopedia

Where known, an aircraft's record shows its date of manufacture and its age.

Douglas DC-3

Related terms

Flight cyclesA unit of aircraft use equal to one take-off and one landing; the main measure of fatigue in the fuselage and in many engine parts. Flight hoursThe time an aircraft, engine or pilot accumulates in flight; one of the basic measures for scheduling maintenance and for recording experience. RetirementThe permanent removal of an aircraft, or of a whole type, from an operator's fleet, whether for sale, conversion, preservation or scrapping. Freighter conversionThe rebuilding of a used passenger aircraft as a freighter, with a large side cargo door, a strengthened floor and a cabin stripped to take pallets and containers. A, B, C and D checksPackages of scheduled maintenance, rising in depth from A to D, that an aircraft undergoes at set intervals of flight hours, cycles or calendar time.
Whole glossary

Cite

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This page was last updated on October 9, 2026

APA

Vuelopedia. (2026, October 9). Service life. Retrieved October 20, 2026, from https://vuelopedia.org/en/glossary/service-life

MLA

“Service life.” Vuelopedia, Fundación Poderia, 9 Oct. 2026, vuelopedia.org/en/glossary/service-life. Accessed 20 Oct. 2026.

Chicago

Vuelopedia. “Service life.” Fundación Poderia. Last modified October 9, 2026. https://vuelopedia.org/en/glossary/service-life.

Harvard

Vuelopedia (2026) Service life. Available at: https://vuelopedia.org/en/glossary/service-life (Accessed: 20 October 2026).

BibTeX

@misc{vuelopedia_en_glossary_service_life,
  author       = {{Vuelopedia}},
  title        = {{Service life}},
  publisher    = {Fundación Poderia},
  year         = {2026},
  date         = {2026-10-09},
  url          = {https://vuelopedia.org/en/glossary/service-life},
  howpublished = {\url{https://vuelopedia.org/en/glossary/service-life}},
  urldate      = {2026-10-20},
  note         = {Accessed 2026-10-20}
}

Wikipedia

{{cite web |url=https://vuelopedia.org/en/glossary/service-life |title=Service life |website=Vuelopedia |publisher=Fundación Poderia |date=2026-10-09 |access-date=2026-10-20 |language=en}}

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