APU oil cooler contamination (Next Gen 131-9B). 737-6/7/8/900

During regular inspection (737-700) we found very often dirt accumulation on APU oil cooler, we incorporate regular inspection and cleaning at A-check interval /600FH/.See also FTD 737NG-FTD-49-01015   Thanks to someone from SkyEurope.

> FOR INFORMATION ONLY. UNCONTROLLED DATA !.

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