As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK FOUND LEFT EXTERNAL AFT OF WING EMERGENCY LIGHT INOPERABLE. (AIRCRAFT IN HEAVY CHECK 12-19-2012 THROUGH 1-11-2013) CONNECTED CONNECTORS P877 & P5320 IAW CRJ 900 AMM 25-26-01. OPS TEST OF EXTERIOR EMERGENCY LIGHTS GOOD IAW CRJ 900 AMM 33-51-15.