// LET'S STUDY AVIATION

Let's Study Aviation

Airframe Test A1 and Power Plant Test A4 — pick a subject and test yourself.

1 8503-1. Which of the following are sometimes used as authorization to deviate from an aircraft’s original type design? 1. FAA Form 337. 2. Supplemental Type Certificate. 3. Airworthiness Directive. 4. Technical Standard Order.