DELAY INDEFINITE (reason if known) EXPECT FURTHER CLEARANCE (time)

Used by ATC to inform a pilot when an accurate estimate of the delay time and the reason for the delay cannot immediately be determined; e.g., a disabled aircraft on the runway, terminal or center area saturation, weather below landing minimums, etc.

Source: FAA Pilot/Controller Glossary (definition from the 2023 edition; current: Change 1 of 7 August 2025).

See also

Related terms

Glossary last updated 2026-10-28.

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