Aviation Mechanic - General, Airframe, and Powerplant › II. Airframe › Task E. Landing Gear Systems

AM.II.E.S20

Skill

Replace master brake cylinder packing seals.

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. 13-51
Chapter 13: Aircraft Landing Gear Systems › Brake Actuating Systems › Independent Master Cylinders
independent brake system is not connected in any way to the aircraft hydraulic system. Master cylinders are used to develop the necessary hydraulic pressure to operate the brakes. This is similar to the brake system of an automobile. In most ... brake actuating systems, the pilot pushes on the tops of the rudder pedals to apply the brakes. A master cylinder for each brake is mechanically connected to the corresponding rudder pedal (i.e., right main brake to the right rudder pedal…
Aviation Maintenance Technician Handbook - Airframe p. 13-54
Chapter 13: Aircraft Landing Gear Systems › Brake Actuating Systems › Boosted Brakes
Figure 13-95. A Goodyear brake master cylinder from an independent braking system with a remote reservoir. Figure 13-96. A common master cylinder with built-in reservoir is shown. Illustration A depicts the master cylinder when the brakes ... compensating port is open to allow fluid to expand into the reservoir should temperature increase. In B, the brakes are applied. The piston rod-end seal covers the compensating port as it contacts the piston head. Boosted Brakes…
Aviation Maintenance Technician Handbook - Airframe p. 13-28
Chapter 13: Aircraft Landing Gear Systems › Landing Gear Rigging & Adjustment › Landing Gear Retraction Test
Landing Gear Retraction Test The proper functioning of a landing gear system and components can be checked by performing a landing gear retraction test. This is also known as swinging the gear. The aircraft is properly supported on jacks ... this check, and the landing gear should be cleaned and lubricated if needed. The gear is then raised and lowered as though the aircraft were in flight while a close visual inspection is performed. All parts of the system should…
Aviation Maintenance Technician Handbook - Airframe p. 12-50
Chapter 12: Hydraulic & Pneumatic Power Systems › High-Pressure Systems › Emergency Backup Systems
Pushing the handle fully downward closes the outlet valve and allows any nitrogen present in the emergency landing gear extension system to be vented overboard. The venting process takes approximately 30 seconds. Dump Valve As compressed nitrogen is released ... landing gear selector/dump valve during emergency extension, the pneudraulic pressure actuates the dump valve portion of the landing gear selector/dump valve to isolate the landing gear system from the remainder of hydraulic system. When activated, a blue DUMP legend…
Aviation Maintenance Technician Handbook - Airframe p. 13-1
Chapter 13: Aircraft Landing Gear Systems › Landing Gear Types
Chapter 13: Aircraft Landing Gear Systems Landing Gear Types Aircraft landing gear supports the entire weight of an aircraft during landing and ground operations. They are attached to primary structural members of the aircraft. The type of gear depends ... aircraft design and its intended use. Most landing gear have wheels to facilitate operation to and from hard surfaces, such as airport runways. Other gear feature skids for this purpose, such as those found on helicopters, balloon gondolas…