What was found
FAILED EMERGENCY LIGHT SYSTEM BATTERY PACK M1673 (REF AAR NR 1000028373). REMOVED BATTERY PACK M1673 ON LH SIDE FORWARD CABIN IAW B737 AMM 33-51-06-960-805. AND PERFORMED OPS. TEST. IAW B 737AMM 33-51-00-710-801. TEST PASS. FAILED FUNCTIONAL CHECK DURING D CHECK IN RFD REMOVED BATTERY PACK M1673 ON LH SIDE FORWARD CABIN IAW B737 AMM 33-51-06-960-805. INSTALLED BATTERY PACK M1673 ON LH SIDE FORWAR D CABIN IAW B737 AMM 33-51-06-960-805 AND PERFORMED OPS. TEST. I AW B 737AMM 33-51-00-710-801. TEST PASS.