FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam 2026 - Free AMT Airframe Practice Questions and Study Guide

The proper hydraulic fluid for an airplane can be determined by consulting the aircraft manufacturer's service manual. This manual contains detailed information and specifications about the type of fluid recommended for use in the specific airplane model. Checking the color of the fluid (A) or relying on the recommendation of an experienced pilot (C) may not be accurate or up-to-date. Trial and error (D) is not a reliable or safe method to determine the proper hydraulic fluid for an aircraft. It is always best to refer to the manufacturer's manual for accurate and reliable information.