Aviation Mechanic - General, Airframe, and Powerplant › I. General › Task D. Fluid Lines and Fittings

AM.I.D.K2

Knowledge

Rigid line or flexible hose material identification.

Study note

Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

Aviation Maintenance Technician Handbook - Airframe p. 14-23
Chapter 14: Aircraft Fuel Systems › Fuel System Components › Fuel Lines & Fittings
Fuel Lines & Fittings Aircraft fuel lines can be rigid or flexible depending on location and application. Rigid lines are often made of aluminum alloy and are connected with Army/Navy (AN) or military standard (MS) fittings. However, in the engine compartment ... lines are determined by the fuel flow requirements of the aircraft fuel system. Flexible hoses are used in areas where vibration exists between components, such as between the engine and the aircraft structure. Sometimes manufacturers wrap either flexible or rigid…
Aviation Maintenance Technician Handbook - General p. 9-14
Chapter 9: Fluid Lines & Fittings › Rigid Tubing Inspection & Repair
However, the line may be repaired by cutting out the damaged section…