What was found
FLT#391, BOS-TPA. "EMERG LIGHT BATTERY 13WL FAILED TEST; REMOVED AND REPLACED EMERG LIGHT BATTERY FIN 13WL IAW AMM 33-51-38"
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLT#391, BOS-TPA. "EMERG LIGHT BATTERY 13WL FAILED TEST; REMOVED AND REPLACED EMERG LIGHT BATTERY FIN 13WL IAW AMM 33-51-38"