| 摘要 |
A method and portable apparatus for servicing a shock absorber (102) on a landing gear assembly (108; 110) of an aircraft (101) in a weight-on-wheels state is described. The shock absorber comprises at least one chamber (111) containing both hydraulic fluid (135) and a gas (121) in fluid communication with each other. Gas is exhausted from the chamber. Dissolved gas is degassed from the hydraulic fluid. The portable apparatus (117) comprises a source (gas cylinder 120) of gas and a source (128) 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. A pre-set mass of gas is then delivered into the chamber under the control of a gas delivery system (inflation kit 119) of the portable apparatus. More accurate servicing of a shock absorber may thus be provided since account is additionally taken of gas dissolved in hydraulic fluid. Also, 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 (102). |
