A&P Hydraulics Study Guide: Fluid Color Chart, Seals, Cleaning and the Formulas

Blue, red, purple. Natural rubber, Buna-N, butyl. Learn that one chart and you've already answered a stack of hydraulics test questions. This A&P Airframe study guide covers the hydraulic fluid chart (MIL-H-7644, MIL-H-5606, MIL-PRF-83282 and Skydrol: base, color, seals and cleaning solvent), compatibility, viscosity and the Saybolt viscometer, flash point vs fire point, what shortens fluid life, handling and safety, then Pascal's law with worked F = P x A examples, cylinders, flow vs pressure, line size, cavitation and pump horsepower (GPM x psi x 0.000583). Hydraulics week on the Hangar. Educational overview only; always follow the aircraft maintenance manual and FAA-H-8083-31.