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What is Decrease in Medical Fitness (DMF) and how do I know whether I need to report it?

Updated by CAAS

A CAAS licence holder who knows or has reason to believe that his/ her physical condition renders him/her temporarily unfit to perform any of the functions to which his/her licence relates as spelt out in Para 20(7) or Para 62(E) of the Air Navigation Order, will need to report DMF to CAAS.

For more information, please refer to the Air Navigation (67 — Aviation Medical Certification) Regulations 2026.

Topics:

Aviation SafetyMedical Assessment for Flight Crew and ATC

Related questions

When and where can I report Decrease in Medical Fitness (DMF) to CAAS?

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I have read the instructions on the Decrease in Medical Fitness (DMF) page but am unsure if I need to notify Civil Aviation Medical Board (CAMB) of my recent medical issue. What should I do?

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How would I know if the Specialist Medical Report I am submitting is acceptable to Civil Aviation Medical Board (CAMB)?

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Do I have to pay a fee to obtain a Medical Assessment from CAAS?

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