NTSB Identification: CHI83FA383.
The docket is stored on NTSB microfiche number 21958.
Accident occurred Tuesday, August 16, 1983 in CENTERTO, IN
Aircraft: CESSNA 421C, registration: N386G
Injuries: 1 Serious,7 Minor.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE PLT REPORTED THAT DURING A CLIMB AFTER TAKEOFF, HE ENGAGED THE AUTOPILOT. WHILE MAKING AN ENTRY ON A TRIP SHEET, HE FELT A BUMP & NOTED THAT THE ACFT HAD STARTED TO DESCEND. HE DISENGAGED THE AUTOPILOT & THE NOSE PITCHED DOWN VIOLENTLY.REDUCING POWER HAD AN ADVERSE EFFECT, SO HE INCREASED POWER AGAIN. HE FINALLY LEVELED THE ACFT JUST PRIOR TO IMPACTING IN A FIELD AT CRUISE POWER. THE ELEVATOR TRIM TAB CABLES WERE FOUND TO HAVE BEEN CROSSED BETWEEN THE TAB ACTUATOR & THE PULLEY IN THE TAIL CONE. THE TAB WAS ALSO FOUND FULLY TRIMMED NOSE DOWN. THE ACFT HAD JUST BEEN GIVEN AN ANNUAL INSPECTION DURING WHICH THE ELEVATOR TRIM ACTUATOR HAD BEEN REMOVED, INSPECTED & LUBRICATED. THIS WAS THE FIRST FLT SINCE THE INSPECTION.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

FLT CONTROL SYST,ELEVATOR TRIM/TAB CONTROL..INCORRECT

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

MAINTENANCE,INSTALLATION..IMPROPER..COMPANY MAINTENANCE PERSONNEL


Contributing Factors

AIRCRAFT HANDLING..UNCONTROLLED..PILOT IN COMMAND

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