What was found
EXTERIOR EMERGENCY LIGHTS SYSTEMS - OVERWING EMERGENCY LIGHTS MEL NUMBER ADDED FOR DISPATCH RELEASE, LOG RE DEFERRAL REQUIRED. EMER LIGHT FAULT. R/R EPSU 3 & BATTERY PER AMP 33-51. DURING RE-INSTALL OF CEILING FAP DISPLAYED LT OWEED EMERGENCY LIGHTS FAULT. REINSTALLED ORIGINAL EPSU & BATTERY. INSTALLED NEW EPSU PER A220 AMP 33-51. INSPECTED LT OWEED LIGHTS , ON INSPECTION FOUND BONDING STRAPS IN UNSATISFACTORY CONDITION . CLEANED AND REINSTALLED BONDING STRAPS PER A220 AMP 20-25-01. INSPECTED WIRE BUNDLE AT CONNECTOR PS3P1, NO SHORT TO GROUNDS FOUND. REINSTALLED CEILING PANEL AT ROW 13. OPS CHECK GOOD AT THIS TIME. (LP# 6359874)