The FAA does not have a strict BMI limit for medical certification. However, BMI may influence the need for further evaluation, especially if it suggests potential underlying health risks that could affect your fitness to fly, such as:

1. Obstructive Sleep Apnea (OSA):
   
   

   • A BMI of 40 or greater (or less if accompanied by other risk factors like a large neck circumference or symptoms like daytime sleepiness) may trigger an evaluation for OSA. Pilots diagnosed with OSA must demonstrate it is being effectively treated to maintain certification.

2. Cardiovascular Health:
   
   

   • High BMI is associated with an increased risk of heart disease, hypertension, and diabetes. If your BMI indicates these risks, the FAA may require additional tests, such as an electrocardiogram (ECG) or a stress test.

3. General Physical Fitness:
   
   

   • While BMI itself isn't disqualifying, the FAA considers whether your overall health could impair your ability to safely operate an aircraft.

Recommendations:

• Maintain a healthy BMI (18.5–24.9) if possible.

• If your BMI is high but you are otherwise healthy, focus on providing detailed medical documentation during your exam (e.g., normal blood pressure, good lab results, absence of sleep apnea symptoms).

• If you suspect your BMI could be a concern, consult with an FAA Aviation Medical Examiner (AME) before applying for certification.

Remember, the FAA evaluates pilots on a case-by-case basis, so high BMI alone isn’t necessarily a disqualifier.