What was found
RETURNED TO THE FIELD TWICE DUE TO AN AIRFRAME VIBRATION. PEFORMED VIBRATION CHECK AND FOUND LEFT PACK EXHAUST DOOR LINKAGE BROKEN. REPLACED LINKAGE. INFORMED CREW FOR MONITORING THIS PROBLEM FOR FUTURE EVALUATION.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
RETURNED TO THE FIELD TWICE DUE TO AN AIRFRAME VIBRATION. PEFORMED VIBRATION CHECK AND FOUND LEFT PACK EXHAUST DOOR LINKAGE BROKEN. REPLACED LINKAGE. INFORMED CREW FOR MONITORING THIS PROBLEM FOR FUTURE EVALUATION.