What was found
CLIMBING TO 14000 FT CREW STATED TO HEAR A LIGHT BUZZING SOUND BUT CONTINUED CLIMB. AFTER PASSING 13000 FT THE BUZZING SOUND TURNED INTO A LOUD NOISE EMERGENCY DECLARED BY ATC.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
CLIMBING TO 14000 FT CREW STATED TO HEAR A LIGHT BUZZING SOUND BUT CONTINUED CLIMB. AFTER PASSING 13000 FT THE BUZZING SOUND TURNED INTO A LOUD NOISE EMERGENCY DECLARED BY ATC.