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PA.I.H.K1cFAA-S-ACS-6C · November 2023Knowledge

Middle ear and sinus problems

ACS element text (the applicant demonstrates understanding of)

Symptoms, recognition, causes, effects, and corrective actions associated with aeromedical and physiological issues, including: c. Middle ear and sinus problems

Bottom line

Pressure changes can cause pain or injury when air cannot equalize through the ears or sinuses.

FAA references

  1. PHAK ch. 17, Aeromedical Factors — FAA-H-8083-25C (2023)
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