What was found
DURING PREFLIGHT CHECK SOME OF THE EMERGENCY LIGHTS WOULD NOT COME ON. MAINTENANCE REMOVED AND REPLACED AN EMERGENCY POWER SUPPLY BATTERY PACK IAW MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (SW21200501341)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING PREFLIGHT CHECK SOME OF THE EMERGENCY LIGHTS WOULD NOT COME ON. MAINTENANCE REMOVED AND REPLACED AN EMERGENCY POWER SUPPLY BATTERY PACK IAW MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (SW21200501341)