---
title: "if unable — aviation glossary — OnlyPlanes"
description: "IFUN stands for if unable in FAA terminology."
canonical_url: "https://onlyplanes.ru/en/learn/if-unable"
locale: en
meta:
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  "og:title": "if unable — aviation glossary"
---

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Aviation abbreviation

# if unable

IFUN

ABBR · Operations

At a glance

## Meaning of if unable

IFUN stands for if unable in FAA terminology.

### More about if unable

This abbreviation is used in flight operations. The English reference lists if unable with the abbreviation IFUN.

FAA abbreviations reflect US aviation usage. Their meaning and permitted use can differ in documents from other countries.

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