What was found
EXTREMELY LOUD HIGH PITCH SQUEAL PASSING THROUGH 16000. CONTINUED TO FL190. ON DESCENT STOPPED PASSING THRU FL160. EMERGENCY DECLARED. REPLACED CAPTAIN SLIDING WINDOW SEAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
EXTREMELY LOUD HIGH PITCH SQUEAL PASSING THROUGH 16000. CONTINUED TO FL190. ON DESCENT STOPPED PASSING THRU FL160. EMERGENCY DECLARED. REPLACED CAPTAIN SLIDING WINDOW SEAL.