// LET'S STUDY AVIATION

Let's Study Aviation

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

1 8536. Who has the authority to approve for return to ser vice a propeller after a 100-hour inspection? 1. A mechanic with a powerplant rating. 2. Any certificated repairman. 3. A non-certificated mechanic working under the supervi sion of a certificated mechanic with airframe and pow erplant ratings.