What was found
EMERGENCY LIGHTING: EMERGENCY LIGHTING OFF FUNCTION INOP. UNABLE TO EXTINGUISH INTERIOR OR EXTERIOR EMERGENCY LIGHTING THROUGH NORMAL SWITCH FUNCTIONS. LIGHTS REMAIN ON EVEN WITH BOTH MAIN BATTERIES DISCONNECTED. TROUBLESHOT DISCREPANCY TO A BAD PILOT CONTROL EMERGENCY LIGHT RELAY. REMOVED RELAY PN M83536/15-022L NSN AND INSTALLED NEW CUSTOMER SUPPLIED RELAY PN M83536/15-022L NSN AS REQUIRED, CHARGED INSTALLED EMRGENCY BATTERY PACKS. OPS CHECK GOOD WITH NO FURTHER DEFECTS NOTED. REF CE680 MM 33-50-10.