What was found
EMERGENCY CABIN INDICATION LIGHT BURNED OUT. DEFER EMER CALL SWITCH LIGHT IAW CRJ900. MEL 23-40-1C PLACARD INSTALLED ENTERED IN MM02 MXC NOTIFIED 96211. INSPECTION REVEALED DEBRIS COLLECTED ON CONNECTOR P327 INDUCING GAP ON CONNECTOR & PREVENTING FULL CONTACT BETWEEN PINS. REMOVED DEBRIS & REINSTALLED CONNECTOR IAW AMM 25-24-13. OPERATIONS CHECKED CRADLE IAW AMM 23-31-10, OPERATIONS CHECKED GOOD. DRY CLEAR MMO2 UPDATED, MXC NOTIFIED & PLACARD REMOVED. ACFT OK FOR SERVICE.