What was found
RECEIVED THE EMERGENCY POWER SUPPLY PACKS. GAINED ACCESS AND REMOVED #1 EMERGENCY POWER SUPPLY PACKS PN: CBS28-1, SN: 3533M DUE TO INTERNAL FAILURE. INSTALLED REPAIRED EMERGENCY POWER SUPPLY PACKS PN: CBS28-1, SN: 005693. GAINED ACCESS AND REMOVED #2 EMERGENCY POWER SUPPLY PACKS PN: CBS28-1, SN: 005362 DUE TO INTERNAL FAILURE. INSTALLED REPAIRED EMERGENCY POWER SUPPLY PACKS PN: CBS28-1, SN: 006280. GAINED ACCESS AND REMOVED #3 EMERGENCY POWER SUPPLY PACKS PN: CBS28-1, SN: 008393 DUE TO INTERNAL FAILURE. INSTALLED REPAIRED EMERGENCY POWER SUPPLY PACKS PN: CBS28-1, SN: 006281. GAINED ACCESS AND REMOVED #4 EMERGENCY POWER SUPPLY PACKS PN: CBS28-1 , SN: 005406 DUE TO INTERNAL FAILURE. INSTALLED REPAIRED EMERGENCY POWER SUPPLY PACKS PN: CBS28-1, SN: 005602. PERFORMED EMERGENCY LIGHT OPS CHECK AND OPS CHECK WAS SATISFACTORY. CLOSED ACCESS AND RETURNED THE AIRCRAFT TO ITS ORIGINAL CONFIGURATION. WORK WAS DONE IRW CE-680A AMM 33-50-06. 21 FEB2022. PARTS: