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# What Is Minimum Equipment List in Aviation?
- URL: https://www.acmiworld.com/what-is-minimum-equipment-list-in-aviation/
- Published: 2026-09-14T16:35:51.000Z
- Updated: 2026-09-14T16:35:51.000Z
- Description: Minimum Equipment List defined for aviation professionals, with its operational or commercial use, document context and related terminology.
- Author: ACMI World
- Tags: Aviation Glossary, Airline Operations & Navigation, #Import 2026-09-14 15:41

## Definition and Operating Context

A Minimum Equipment List, or MEL, is an operator-specific approved document identifying equipment that may be inoperative for a limited period while the aircraft remains dispatchable under stated conditions.

Aviation Glossary

**Term:** Minimum Equipment List

**Category:** Airline Operations & Navigation

## How It Is Used in Flight Operations

Minimum Equipment List is used within dispatch, flight planning, crew procedures, aircraft approvals or air traffic operations depending on the subject. Operators must apply the version and approval basis recognized by the relevant aviation authority.

## Operational Effect

The MEL is based on the applicable MMEL but adds the operator's procedures, intervals and regulatory approval.

## Approval and Dispatch Considerations

Equipment capability alone may not be sufficient. Operator approval, crew qualification, maintenance status, database currency, route authorization and company procedures can all affect whether the capability may be used on a specific flight.

## Related Aviation Topics

Related ACMI World coverage includes [structuring an ACMI RFP](https://www.acmiworld.com/how-to-structure-an-acmi-rfp-for-short-term-airline-capacity/), [ACMI lease pricing](https://www.acmiworld.com/acmi-lease-pricing-explained-what-airlines-actually-pay-for-capacity/), [benefits of ACMI leasing](https://www.acmiworld.com/benefits-of-acmi-leasing-for-airlines/), [international charter compliance](https://www.acmiworld.com/international-charter-compliance-guide-for-buyers/) and [wet lease versus dry lease](https://www.acmiworld.com/wet-lease-vs-dry-lease-explained-key-differences-for-aircraft-operators/).

The MEL is based on the applicable MMEL but adds the operator's procedures, intervals and regulatory approval.

Frequently Asked Questions

## Minimum Equipment List FAQ

What does Minimum Equipment List mean in aviation?

A Minimum Equipment List, or MEL, is an operator-specific approved document identifying equipment that may be inoperative for a limited period while the aircraft remains dispatchable under stated conditions.

Why does Minimum Equipment List matter?

The MEL is based on the applicable MMEL but adds the operator's procedures, intervals and regulatory approval.

Where would an aviation professional encounter Minimum Equipment List?

It is commonly encountered in airline operations & navigation documents, procedures, calculations or operating discussions where the underlying technical or commercial issue is relevant.

Does installed equipment automatically authorize the operation?

No. Many capabilities also require operator approval, current maintenance status, crew qualification and procedures accepted by the relevant authority.