What was found
PDX - C1 - UPPER TCAS ANTENNA BOTH AFT NUTPLATES ARE BROKEN. REMOVED AND REPLACED TO NUTPLATES IAW DASH 8-400 SRM 51-42-05.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
PDX - C1 - UPPER TCAS ANTENNA BOTH AFT NUTPLATES ARE BROKEN. REMOVED AND REPLACED TO NUTPLATES IAW DASH 8-400 SRM 51-42-05.