What was found
FAILED EMERGENCY LIGHT SYSTEM BATTERY PACK M1671 (REF AAR NR 1000028371). REMOVED BATTERY PACK M1671 IAW B737 AMM 33-51-06-960-805 STEP 4.E(4). INSTALLED NEW BATTER PACK M1671 IAW B737 AMM 33-51-06-960-805 STEP 4.E(5). AND PERFORMED OPS TEST. IAW B737 AMM 33-51-00-710-801. TEST GOOD. FAILED FUNCTIONAL CHECK DURING D CHECK AT RFD SDR IS COMPLIED WITH REMOVED BATTERY PACK M1671 IAW B737 AMM 33-51-06-960-805 STEP 4. E(4). INSTALLED NEW BATTER PACK M1671 IAW B737 AMM 33-51-06-960- -805 STEP 4.E(5). AND PERFORMED OPS TEST. IAW B737 AMM 33-51-00- -710-801. TEST GOOD.