What was found
RIGHT ENGINE FAN AIR CONTROL SYSTEM INOP. TRANSFERRED TO MDDR 141660 AS PER MEL 36-12-02-01, ACCOMPLISHED M PROCEDURE DATE 31JAN21 LP 1324714 ITEM 5 NRT. PERFORMED FAMV MAN OPE TEST AND SENSING LINE LEAK CK OK BTWN FAMV & FATS. FOUND FAMV AIR FILTER VERY DIRTY. ALSO FATS AIR FILTER DIRTY, SO CLEANED UP AIR FILTER THEN R-ENG FAN AIR CONT SYS OPE TEST NORMAL, NO EICAS MSG FOUND BY ENG RUN UP,& ALSO BITE TEST PASSED PER AMM 36-11-16 36-11-17 36-11-00. THIS CLEARS MDDR 141660.