MIL-PRF-85704C

Abstract

This specification establishes the requirements for three types of turbine engine gas path cleaning compounds, two are used for off-line (starter cranked) engine cleaning operations and one is used for on-line (fired) engine cleaning (See <a>6.1</a>). <br>The cleaning compounds will be of the following types, as specified (see <a>6.3</a>). <br>The types of cleaning compounds are as follows: </span><pre> Type I - Solvent emulsion cleaner concentrate containing aromatic hydrocarbon solvents for use in starter cranked engine cleaning operations only. Type II - Aqueous cleaner concentrate containing no aromatic hydrocarbon solvents for starter cranked engine cleaning operations only. Type II RTU - Ready-To-Use aqueous cleaner containing no hydrocarbon solvents for starter cranked engine cleaning operations only. Type III - Aqueous cleaner concentrate containing no hydrocarbon solvents for use in on-line (fired) engine cleaning of specifically approved engines. Type III RTU - Ready-To-Use aqueous cleaner containing no hydrocarbon solvents for use in on-line (fired) engine cleaning of specifically approved engines.</pre> <br> <strong>Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Air Warfare Center Aircraft Division, Code 414100B120-3, Highway 547, Lakehurst, NJ 08733-5100, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.</strong> <br><b><u>Intended Use:</u></b> The cleaning compounds covered by this specification are used in the maintenance of military aircraft exposed for prolonged periods to extreme seagoing operating environments not encountered by commercial aircraft. Operating requirements and conditions result in the need to clean military engines on a significantly more frequent basis than commercial engines. A product's cleaning efficiency is critical to the military's use of these materials and it can only be determined via expensive and time consuming engine testing. Types III, and III RTU cleaning compounds are intended for cleaning the compressor section of gas turbine aircraft engines with the engine off-line (with the starter motoring the engine). Types III and III RTU are intended for on-line cleaning of the compressor section of a gas turbine engine in accordance with specific engine maintenance instructions. The cleaning compound will remove accumulated salt, dirt, and oily residues from the gas path. <br>