What was found
ALL FORWARD EMERGENCY EXIT LIGHTS INOP IN ARM OR ON POSITION WITH BATTERY OFF. BATTERY PACK #1 RESET INERTIAL SWITCH VERIFIED CONNECTIONS TO BATTERY PACK #1 ARE GOOD, NO CHANGE, ALL FORWAR LIGHTING STILL INOP, SWAPPED BATTERY PACK #2 AND REPOSITIONED INTO #1. PERFORMED OPS ALL FWD LIGHTING FULLY OPS. ALL WORK DONE IAW AMM 33-50-00. INSTALLED BATTERY PACK #2 BACK TO ITS ORIGINAL POSITION , #1 REQUIRES REPLACEMENT. REMOVED FWD BATTERY PACK AND REPLACED WITH AN OVERHAULED BATTERY PACK. POWERED UP THE ACFT WITH AN EXTERNAL GPU ELECT POWER & CHARGED BATTERY PACKS FOR 1.75 HOURS, PERFORMED BATTERY PACKS FUNCTIONAL CHECK. BATTERY FUNCTIONAL CHECK & EMER LIGHTS OPS CHECK PASSED. WORK PERFORMED IAW AMM 33·50-01 & 33-50·00..