What was found
AIRCRAFT OUT OF SERVICE FOR HEAVY SERVICE CHECK. EMERGENCY LIGHT BATTERY 11WL FAILED HEAVY SERVICE CHECK TEST. R & R BATTERY ASSEMBLY & OPERATIONS CHECKED GOOD IAW AMM 33-51-39-000-05A & AMM 33-51-39-400-05A.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT OUT OF SERVICE FOR HEAVY SERVICE CHECK. EMERGENCY LIGHT BATTERY 11WL FAILED HEAVY SERVICE CHECK TEST. R & R BATTERY ASSEMBLY & OPERATIONS CHECKED GOOD IAW AMM 33-51-39-000-05A & AMM 33-51-39-400-05A.