What was found
FOUND WEL BAT POWER DEGRADED AT CLASSES 31, 30, 23, 20, 19, 18, 16, 13, 12, AND 9. REQUIRE BAT REPLACEMENT. AMM 33-51-07REMOVED AND REPLACED WEL BAT CLASS 20 REF AMM 33-51-07. OPS CHECK GOOD. REMOVED AND REPLACED WEL BAT CLASS 13 REF AMM 33-51-07. OPS CHECK GOOD. REMOVED AND REPLACED WEL BAT CLASS 20 REF AMM 33-51-07. OPS CHECK GOOD. REMOVED AND REPLACED CLASS 23 WELS CONTROL UNIT BATTERY PER DMC-B787-A-33-51-07. OPS CHK GOOD. REMOVED AND REPLACED CLASS 9 WELS CONTROL UNIT BATTERY PER DMC-B787-A-33-51-07. OPS CHK GOOD. REMOVED AND REPLACED CLASS 16, 18, 30, AND 31 WELS CONTROL UNIT PREVIOUSLY REJECTED IN ERROR, ALL IDT REQUIREMENTS C/W. NO DISCREPANCIES.