NTSB Identification: ATL87LA213.
The docket is stored on NTSB microfiche number 34712.
Accident occurred Wednesday, July 15, 1987 in MIDDLEFIELD, OH
Probable Cause Approval Date: 10/07/1988
Aircraft: CESSNA 152, registration: N4649M
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE STUDENT PLT'S SEAT SLID BACK DURING THE TAKEOFF ROLL, FOLLOWING A TOUCH-AND-GO LDG. THE STUDENT LOST DIRECTIONAL CONTROL AND THE AIRPLANE RAN OFF THE LEFT SIDE OF THE RWY. THE AIRPLANE IMPACTED A DITCH AND NOSED OVER. POST-CRASH EXAM OF THE SEAT ASSY BY A MECHANIC REVEALED THAT THE SEAT LATCH ASSY TENSION SPRING HAD BROKEN. THE MECHANIC NOTED NO PROBLEMS WITH THE LATCH PIN OR THE SEAT TRACK THAT IT ENGAGES. THE PIN IS ATTACHED TO A HANDLE OPERATED BY THE PLT. DOWNWARD MOVEMENT OF THE HANDLE LOWERS THE PIN INTO ONE OF THE SEAT TRACK HOLES AND SECURES THE SEAT IN PLACE. THE SPRING ACTS TO ASSIST THE DOWNWARD MOVEMENT OF THE HANDLE AND PIN. THE CESSNA 152 PLT OPER HANDBOOK STATES THAT THE PLT SHOULD CONFIRM THAT THE SEAT IS LOCKED IN PLACE AFTER RELEASING THE HANDLE.

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

PROCEDURES/DIRECTIVES..NOT FOLLOWED..PILOT IN COMMAND

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

PREFLIGHT PLANNING/PREPARATION..INADEQUATE..PILOT IN COMMAND

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

FUSELAGE,SEAT..DISENGAGED

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

FUSELAGE,SEAT..SLIPPED


Contributing Factors

FUSELAGE,SEAT..FAILURE,PARTIAL


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