NTSB Identification: NYC83FA115.
The docket is stored on NTSB microfiche number 24164.
Accident occurred Monday, May 16, 1983 in ROBBINSVILLE, NJ
Aircraft: Beech BE60, registration: N821BE
Injuries: 3 Uninjured.

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 ACFT WAS STRUCTURALLY DAMAGED DURING RECOVERY FROM A DESCENDING RIGHT SPIRAL THAT OCCURRED AS THE FLT PASSED THRU FLT LEVEL 190. AS THE PLT RECVD FROM THE DESCENDING SPIRAL THE INBOARD AND OUTBOARD AILERON HINGE RIVETS WERE SHEARED. THE ALTITUDE DEVIATION OCCURRED IN IMC WEATHER. AN EMERGENCY WAS DECLARED WITH ATC. VECTORS WERE PROVIDED TO JFK APRT FOR A VFR LANDING. THE FLT LANDED WITHOUT FURTHER INCIDENT. THE PLT REPORTED THAT AS THE ACFT CLIMBED THROUGH 19000FT AT 100 KTS A LOUD BANK WAS HEARD AND THE ACFT STARTED SHAKING. THE PLT DISENGAGED THE AUTOPLT AND LOWERED THE NOSE. HE STATED THE ACFT ENTERED A RIGHT DESCENDING SPIRAL. HE COULD NOT MOVE THE AILERON AND RECOVERED WITH RUDDER AND ELEVATOR. THE RIGHT AILERON ROD AND HINGES WERE EXAMINED AND THE FAILURES WERE FOUND TO BE SHEAR FROM DUCTILE OVERLOAD. THE FAILED RIVETS MET SPECIFICATIONS FOR HARDNESS TESTS.

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

SPIRAL..INADVERTENT..PILOT IN COMMAND

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

FLIGHT CONTROL,AILERON TAB..FAILURE,TOTAL

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

MANEUVER..PERFORMED..PILOT IN COMMAND

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

FLIGHT CONTROL,AILERON TAB..OVERLOAD

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