A portable apparatus 250 for servicing a shock absorber (102, figure 1) on a landing gear assembly (108) of an aircraft when the aircraft is in a weight on wheels configuration is provided. The shock absorber comprises a chamber (111, figure 4) comprising both hydraulic fluid (135) and gas (121) in fluid communications with each other. The apparatus comprises a source of gas 251, a source of hydraulic fluid 201, and a gas delivery system 203. The gas delivery for delivering a pres-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. The tank may have a variable volume. The apparatus may include an actuator which is arranged to effect a change in the volume of the variable volume tank. The apparatus may comprise a control unit (205, figure 11) configured to control the delivery by the gas delivery system of pre-set mass of gas into the shock absorber.
Landing gear shock absorber servicing
2017-02-15
Patent
Electronic Resource
English