What was found
DURING HMV, INOP EPSU 10WL IN PASSENGER CABIN DURING OPS TEST OF THE EMERGENCY LIGHTS ; REF AEROMAN N/R 2021- 298604, REMOVED AND REPLACED EPSU POSITION 10WL, IAW AMM 33-51-38-000-001-A AND AMM 33-51-38-400-001-A, OPS TEST GOOD PER AMM 33-51-00-710-001. ( P/N OFF 3214-54-10, S/N OFF 007998, P/N ON 3214-54-10, S/N ON 006825)