What was found
DURING MAINTENANCE, THE RED OVERWING EMERGENCY EXIT LIGHT IS NOT WORKING. R & R ESPU & BATTERY PACK IAW AMM 33-51-38. ALL EMERGENCY LIGHTS NOW CHECK OK. ADDITIONAL PART REPLACED, DIEHL, PN 3214-31, SN 767628, TAT 2218, TAC 816, TIME SINCE 2218.