What was found
ON INSTALLATION IN A/C, CONTROL HEAD GUARD INDICATOR LIGHT ILLUMINATED AND STAYED LIT EVEN WITH NO GUARD MODULE INSTALLED. REMOVED AND REPLACED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ON INSTALLATION IN A/C, CONTROL HEAD GUARD INDICATOR LIGHT ILLUMINATED AND STAYED LIT EVEN WITH NO GUARD MODULE INSTALLED. REMOVED AND REPLACED.