This is the 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.

Lubricating oil coolers (oil coolers) will be of the following types as specified in the acquisition document (see 6.2).

The types of oil coolers are as follows:

       Type IA - Petroleum base lubricating oil cooler for aircraft piston engines and turbo
                 propeller gear boxes.

       Type IB - Petroleum base lubricating oil cooler for helicopters transmission gear boxes.

       Type II - Synthetic base lubricating oil cooler for aircraft gas turbine engines.

Beneficial comments (recommendations, additions, deletions) and any pertinent data that may be of use in improving this document should be addressed to: Oklahoma City Air Logistics Center/TICLA, 3001 Staff Drive, Suite 1AE1-101A, Tinker AFB, OK 73145-3036, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.