Definition
A long-standing pattern of thinking, feeling, and behaving that differs significantly from what is expected, is inflexible across many situations, and leads to repeated problems in work, relationships, or judgment. In FAA medical certification, a personality disorder that has resulted in overt acts is a disqualifying condition for all classes of medical certificate.
Plain English
A deeply rooted way of behaving that consistently causes problems for the person and those around them. The FAA treats it as a medical concern when it has actually shown up in harmful actions, not just as a label on paper.
Context Anchor
Seen in FAA medical certificate discussions, especially in the list of mental health conditions that may affect whether a pilot can be medically certified.
Derivation
From Latin persona, meaning 'mask' or 'character,' and disorder, meaning 'a disturbance of normal function.' The term points to a disturbance in the enduring character of a person, not a passing mood or temporary stress.
Why Pilots Care
Certain personality disorders are disqualifying or require special issuance for an FAA medical certificate because they can impair judgment, impulse control, and safe decision-making in flight.
Intuition Check
Do not read this as “a difficult personality” or “having a bad day.” In this FAA context, it means a serious diagnosed pattern, especially one shown by repeated observable actions that may affect safety.
Example Sentence 1
An applicant with a diagnosed personality disorder that has resulted in overt acts will not be issued an FAA medical certificate.
Example Sentence 2
A pilot with a treated personality disorder may still fly after providing supporting documentation for a special issuance medical.