Castrol Aero 40 Red

Approval Status Castrol Aero 40 -Red is formulated in accordance with Douglas Aircraft Specification DPS 3.334, and referenced as Douglas stock number DPM 6176. Additionally, Castrol® Aero 40 Yellow is formulated as an alternative to Boeing Service Letters 707-SL-12-2; 727-SL-12-2; 737-SL-12-2; and 757-SL-27-15-B. These letters instruct the addition of an EP additive to either the standard or corrosion inhibited mineral based hydraulic fluid for use in their landing gear shock struts. Castrol® Aero 40 Yellow is fully approved to Boeing BMS 3-32 (Type II).

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