LANDING GEAR SHOCK ABSORBER SERVICING

摘要

A method and apparatus for servicing a shock absorber on a landing gear assembly of an aircraft in a weight-on-wheels state is disclosed. The shock absorber includes at least one chamber containing both hydraulic fluid and a gas in fluid communication with each other. The apparatus includes a source of gas and a source of hydraulic fluid. The amount of hydraulic fluid in the chamber is corrected, preferably such that the chamber is then filled with a known amount of degassed hydraulic fluid. The process may be at least semi-automatically performed, for example under the control of a control unit. By delivering a pre-set mass of gas into the chamber, there is no need to rely on a measure of gas pressure or H-dimension (h) when servicing the shock absorber, and more accurate servicing of a shock absorber may thus be provided.

主权项

1. A portable apparatus for servicing a shock absorber on a landing gear assembly of an aircraft when the aircraft is in a weight on wheels configuration, the shock absorber comprising at least one chamber containing both hydraulic fluid and a gas in fluid communication with each other, wherein the apparatus comprises:
a source of gas, a source of hydraulic fluid, and a gas delivery system for delivering a pre-set mass of gas into the shock absorber, the gas delivery system including a tank that is arranged both to receive gas from a shock absorber and to deliver gas to the shock absorber.