As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX- EMERGENCY LIGHTS IN CABIN FLASH ON AND OFF DURING FLIGHT. RIGHT STALL WARNING CAUTION LIGHT ILLUMINATED REPEATEDLY DURING FLIGHT. REMOVED AND REPLACED NR 2 BRUSH BLOCK AND CURRENT LIMITER 2421-F10. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.