What was found
DUE TO RECENT HISTORY AND TO AVOID POSSIBLE SERVICE DISRUPTION OF MAINT MESSAGE 27-22321 SLATS DRIVE CAUTION OUTBOARD SLAT SKEW SENSOR 5 FAILED REPLACE THE LEFT LE OUTBOARD SLAT SKEW DETECTION MECHANISM ASSY PER AMM DMC-B787-A-27-89-03-00A-520A-A/DMC-B787-A-27-89-03-00A-720A-A. REMOVED AND REPLACED LEFT WING OUTBOARD LEADING EDGE SLAT SKEW DETECTION MECHANISM ASSEMBLY. OPS CHECK GOOD. REF AMM 27-89-03. VERIFIED OPERATIONAL CHK OF SLAT SKEW SYS ON THE LH WING, SAFETY AND SECURITY CHECKED FOR SKEW MECHANISM INSTALL. OPS CHK GOOD ACCOMPLISHED INSTALLATION OF OUTBOARD LEADING EDGE SLAT SKEW DETECTION MECHANISM ASSEMBLY. REINSTALLED PANEL 522BB, AND RETURNED AIRCRAFT BACK TO NORMAL. OK FOR SERVICE. REF AMM 27-89-03