What was found
EMERGENCY LIGHT BATTERY PACK M1670 FAILED TO TEST. ACFT GROUNDED. REMOVED AND REPLACED THE POWER SUPPLY IAW AMM 33-51-06-960-806, OPS NORMAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
EMERGENCY LIGHT BATTERY PACK M1670 FAILED TO TEST. ACFT GROUNDED. REMOVED AND REPLACED THE POWER SUPPLY IAW AMM 33-51-06-960-806, OPS NORMAL.