Neurologic

To qualify for a second-class medical certificate, you cannot have an established medical history or diagnosis of epilepsy, unexplained loss of consciousness, or unexplained temporary loss of control over nervous system functions (like involuntary movements or paralysis).

Additionally, you cannot have any other seizure disorder, consciousness disturbance, or neurological condition that the Federal Air Surgeon determines either:

• Currently prevents you from safely performing pilot duties, or
• Is reasonably expected to prevent you from doing so during the certificate's validity period

The key distinction is between automatic disqualifications (epilepsy and unexplained neurological events) and conditions requiring individual assessment by the Federal Air Surgeon. "Without satisfactory medical explanation" means doctors must be able to identify and explain the cause—unexplained neurological events are disqualifying because they could recur unpredictably during flight. This standard protects flight safety by ensuring pilots maintain reliable neurological function throughout their certificate period.

*This is a plain-English summary for study only. The official 14 CFR text on this page is controlling — always read the current regulation and consult a CFI.*