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NTSB Query - Elevator

Beej

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Anyone know what this refers to regarding the elevator modification?



<CENTER>NTSB Identification: NYC86FHD03 .
The docket is stored on NTSB microfiche number 34463.
14 CFR Part 91: General Aviation
Accident occurred Wednesday, August 27, 1986 in MOORESTOWN, NJ
Probable Cause Approval Date: 1/25/1988
Aircraft: PASSONNO SKYBOLT, registration: N8FP
Injuries: 1 Fatal.
</CENTER>


THE PASSONNO SKYBOLT WAS OBSERVED TO RECOVER FROM A LOOP AND THEN THE TAIL SURFACES STARTED TO SHAKE. THE ACFT THEN DESCENDED TO THE GROUND AND WAS DESTROYED BY IMPACT. EXAMINATION OF VARIOUS HORIZONTAL STABILIZER AND ELEVATOR COMPONENTS SHOWED THAT THE FAILURES WERE DUE TO OVERSTRESS AND SHEER FORCES. IT WAS NOTED THAT BOTH THE LEFT AND RIGHT HORIZONTAL STABILIZERS HAD BEEN SUBJECTED TO A DOWNWARD FORCE. IN ADDITION THE INVESTIGATION DISCLOSED THAT THE ELEVATOR HAD NOT BEEN MODIFIED IN ACCORDANCE WITH DESIGN RECOMMENDATION REGARDING THE INSTALLATION OF LARGER ENGS.



The National Transportation Safety Board determines the probable cause(s) of this accident as follows:FLIGHT CONTROL,ELEVATOR..OVERLOAD
FLIGHT CONTROL,STABILATOR..OVERLOAD





Contributing Factors


AEROBATICS..PERFORMED..PILOT IN COMMAND
 

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