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

AM.II.E.S16

Skill

Troubleshoot an air/oil shock strut.

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. 13-7
Chapter 13: Aircraft Landing Gear Systems › Shock Absorbing & Non-Shock Absorbing Landing Gear › Shock Struts
Shock Struts True shock absorption occurs when the shock energy of landing impact is converted into heat energy, as in a shock strut landing gear. This is the most common method of landing shock dissipation in aviation. It is used ... aircraft of all sizes. Shock struts are self-contained hydraulic units that support an aircraft while on the ground and protect the structure during landing. They must be inspected and serviced regularly to ensure proper operation. There are many different…
Aviation Maintenance Technician Handbook - Airframe p. 13-12
Chapter 13: Aircraft Landing Gear Systems › Landing Gear Types › Servicing Shock Struts
Always be positioned to the side of the trajectory of any valve core in case it releases. Propelled by strut air pressure, serious injury could result. 5. Loosen the swivel nut. For a valve with a valve core (AN2687 ... turn (counter clockwise). Using a tool designed for the purpose, depress the valve core to release all of the air in the strut. For a valve without a valve core (MS28889), rotate the swivel nut sufficiently to allow the air…
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…