What was found
ON DESCENT BEGINING @ FL310, LH ENGINE SPOOLS UP/DOWN 10% N1 & N2, AND AIRCRAFT YAWS WITH EACH SPOOL UP & DN.(<P>TROUBLESHOOT ENG FAULT IAW WDM 71-51-51 AND 71-51-53. VERIFIED VBV, VSV AND T12 WIRING FROM THE EEC TO THE RESPECTIVE COMPONENTS NO FAULTS NOTED. VERIFIED VBV, VSV AND T12 INTERNAL COILS, NO FAULTS NOTED. ADDITIONAL T/S REQUIRED.</P><P>LP 1098881 - M9: REMOVED AND REPLACED 8 STAGE CHECK VLV IAW B767-300 AMM 36-11-06. (P/N OFF: 8A8556-1, S/N OFF: 200007167)</P><P>LP 1098882 - M10: INSPECTED P53 SENSE LINE, FOUND WEEP HOLE IN LINE. PLUGGED, PURGED, CLEARED PLUG WEEP HOLE IAW B767-300 AMM 73-21-24. ENGINE RUN REQUIRED.</P><P>LP 1098882 - M11: ENGINE RUN PERFORMED, OPS CHECK GOOD IAW AMM 71-00-00.</P><P>LP 1098882 - M12: REMOVED AND REPLACED T12 SENSOR IN #1 ENG RIGHT HAND POSITION IAW AMM 73-21-05. (P/N OFF: 154DN2, S/N OFF: EGN34037). REF M11 FOR ENG RUN.</P><P>LP 1098883 - M13: TLA RIG CHECK COMPLETED NO DEFECTS NOTED WITHIN LIMITS IAW AMM 73-21-09.</P><P>LP 1098883 - M15: REMOVED AND REPLACED #1 ENG LH T12 SENSOR IAW B767 AMM 73-21-06. PERFORMED EEC STATIC TEST 11 IAW B767 AMM 71-60-00. OPS CHECK GOOD AT THIS TIME.</P>)