What was found
AIRCRAFT WAS NOT GROUNDED: REMOVED MEGAPHONE FOR TROUBLESHOOTING. MAINTENANCE INSTALLED SAME MEGAPHONE WITH NEW BATTERIES REPLACED BY STANDARD MAINTENANCE PRACTICES.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS NOT GROUNDED: REMOVED MEGAPHONE FOR TROUBLESHOOTING. MAINTENANCE INSTALLED SAME MEGAPHONE WITH NEW BATTERIES REPLACED BY STANDARD MAINTENANCE PRACTICES.