As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CABIN PREFLIGHT, FOUND THAT EMERGENCY LIGHTS ON LEFT SIDE OF CABIN WOULD NOT ILLUMINATE DURING EMERGENCY LIGHT TEST. P/N INSTALLED/REMOVED MPN D717-02-0001. SERIAL NUMBER REMOVED 48407. REMOVAL INSTALLATION C/W AMM 33-51-06-2. OPS TEST SATISFACTORY. A/C OK TO CONTINUE.