What was found
AIRCRAFT WAS NOT GROUNDED. EPSU BATTERY AT DOOR 4L (17WL) FAILED TEST. REPLACED EPSU BATTERY AT 17WL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS NOT GROUNDED. EPSU BATTERY AT DOOR 4L (17WL) FAILED TEST. REPLACED EPSU BATTERY AT 17WL.