Aviation English
MEL and CDL MEL and CDL

What is control number?

control number A unique identifier assigned to a deferred defect, MEL/CDL item, or maintenance entry for tracking and compliance.

Source: ICAO Doc 9432, FAA PCG

How is “control number” Used in Practice?

Each deferred defect must be assigned a control number for recordkeeping.

Certification Exam Relevance

ICAO Level 4ICAO Level 5ICAO Level 6EASA FCL.055

Who Needs to Know This Term?

  • Pilots
  • Air Traffic Controllers
  • Cabin Crew

Related Aviation English Terms

Maintenance control centerdeferralconsecutive flightsdeferred defect report

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Frequently Asked Questions

What is control number?

A unique identifier assigned to a deferred defect, MEL/CDL item, or maintenance entry for tracking and compliance.

Where can I learn this term for free?

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