Dual-stage, mixed gas/fluid shock strut servicing

A method for servicing a dual-stage, mixed gas/fluid shock strut, comprising:

• charging a secondary gas chamber with a first quantity of compressed gas, wherein a secondary chamber pressure corresponds to a servicing temperature;
• pumping oil into a primary chamber of the dual-stage, mixed gas/fluid shock strut, wherein the dual-stage, mixed gas/fluid shock strut extends in response to oil being pumped into the primary chamber until a first shock strut extension and the secondary chamber pressure match a primary chamber oil servicing reference curve;
• and
• charging the primary chamber with a second quantity of compressed gas until a second shock strut extension and a primary chamber pressure match a gas servicing reference curve.

A method for servicing a dual-stage, mixed gas/fluid shock strut, comprising:

• charging a secondary gas chamber with a first quantity of compressed gas, wherein a secondary chamber pressure corresponds to a servicing temperature;
• circulating oil through a primary chamber of the dual-stage, mixed gas/fluid shock strut via an oil charge port and an oil bleed port;
• extending the dual-stage, mixed gas/fluid shock strut, using a servicing tool, to a first shock strut extension corresponding to the secondary chamber pressure according to an oil servicing reference curve;
• closing the oil bleed port;
• pumping the oil into the primary chamber until the secondary chamber pressure reaches a pre-determined pressure;
• closing the oil charge port;
• extending the dual-stage, mixed gas/fluid shock strut to a fully extended position;
• and
• charging the primary chamber with a second quantity of compressed gas until a second shock strut extension and a primary chamber pressure match a gas servicing reference curve.