Level bust
From EUROCONTROL ATM Lexicon
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| Term | level bust |
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Abbreviation
Definition
Any unauthorised vertical deviation of more than 300 feet from an ATC flight clearance.
Definition Source
EUROCONTROL EATMP Glossary, June 2001
Note
Within RVSM airspace this limit is reduced to 200 feet.(EUROCONTROL - HEIDI)
Definitions applied by other organisations are similar but sometimes refer to a deviation of 300 feet or more.
The level bust issue only relates to aircraft in controlled airspace or a designated ATZ outside controlled airspace and under either radar or procedural ATC control.
(Note source: Skybrary, URL: http://www.skybrary.aero/index.php/Level_Bust)
