As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THE EMERGENCY AUDIO CANCEL SWITCH IS MISSING TOGGLE SWITCH; IS STILL SAFETY WIRED. THE ACFT WAS REMOVED FROM SERVICE. R & R THE EMERGENCY AUDIO CANCEL SWITCH 12WW IAW STANDARD PRACTICES MM CAP 20-27-13 . THE OPS TEST IAW JIC 31-50-00-10000 WAS OK. THE ACFT WAS RETURNED TO SERVICE.