MIL-PRF-25478D, PERFORMANCE SPECIFICATION: COOLERS, LUBRICATING OIL, AIRCRAFT, GENERAL SPECIFICATION FOR (06-MAY-2013)

MIL-PRF-25478D, PERFORMANCE SPECIFICATION: COOLERS, LUBRICATING OIL, AIRCRAFT, GENERAL SPECIFICATION FOR (06-MAY-2013)., This is general specification for aircraft engine lubricating oil coolers that provide oil temperature regulation for aircraft gas turbine engines using high temperature synthetic base lubricating oil, and aircraft piston engines, turbo propeller gear boxes, and helicopter transmission gear boxes using petroleum based oil. Oil coolers covered by this specification are intended for use in aircraft piston and jet engine lubricating oil, turbo-propeller gear box oil, and helicopter transmission gear box oil systems.