Maintenance Powerplant; Maintenance Airframe
Maintenance Technician 1
Training / Qualification
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Human Factors
A pilot reported that the right side of aircraft was resting low. After performing an X [cylinder] dimension check and referring to the Maintenance Manual; it was determined the left main landing gear strut X [cylinder] dimension was too high and the right main landing gear strut was too low. During the servicing of the right main landing gear strut; the nitrogen depleted to the point that fluid began to escape from the Schrader valve on top of the strut. I noticed the discoloration of the hydraulic fluid (MIL-H-5606) and the fact that it lacked any color of red to it. The fluid that came out was grey and smelled like fuel. Upon identifying the problem; the customer was notified of the findings.
[Narrative 2 contains no additional information]
Maintenance personnel report that on several occasions they have found Lear jet landing gear struts serviced with jet fuel rather than hydraulic fluid.