As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
YQB - CREW REPORTED THAT WHEN THE EMERGENCY LIGHTS WERE SELECTED ON, THEY WOULD ILLUMINATE FOR A SECOND AND THEN EXTINGUISH. AIRCRAFT WAS FERRIED TO BOS FOR REPAIR. MAINTENANCE REMOVED AND REPLACED ALL FIVE POWER SUPPLY UNITS IAW SAAB MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. REF SIMA200130002 (M)