NTSB Probable Cause

THE IMPROPER INSTALLATION OF THE ELEVATOR BY COMPANY MAINTENANCE PERSONNEL AND THE LACK OF PROPER INSPECTIONS BY A COMPANY CERTIFIED MECHANIC/INSPECTOR AND THE FAA CERTIFIED MECHANIC WITH INSPECTOR AUTHORIZATION. A FACTOR IN THIS ACCIDENT WAS AN INSUFFICIENTLY DEFINED MAINTENANCE PROCEDURES THAT ALLOWED MULTIPLE MAINTENANCE TASKS TO BE COMBINED INTO A SINGLE LINE ENTRY.