What was found
HIGH LP VIBRATION ON THE NUMBER 4 ENGINE. RAN QRH AND DID NOT REMEDY THE ISSUE. DECLARED EMERGENCY. C/W ENVOY W/C EA72-00-00-012 AND EA72-00-00-013, OPS CHECK GOOD
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
HIGH LP VIBRATION ON THE NUMBER 4 ENGINE. RAN QRH AND DID NOT REMEDY THE ISSUE. DECLARED EMERGENCY. C/W ENVOY W/C EA72-00-00-012 AND EA72-00-00-013, OPS CHECK GOOD