NTSB Identification: LAX87FA309.
The docket is stored on NTSB microfiche number 40093.
Accident occurred Sunday, August 23, 1987 in SALTON CITY, CA
Probable Cause Approval Date: 11/28/1989
Aircraft: BEECH C-55, registration: N3784Q
Injuries: 2 Fatal.

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.

A GROUND WITNESS OBSERVED THE AIRCRAFT AT A LOW ALTITUDE, CLIMBING, WITH THE LANDING GEAR EXTENDED. HE STATED THAT HE HEARD THE ENGINE SOUNDS DECREASE AND OBSERVED THE AIRCRAFT ROLL OVER INTO A SPIN. THE WITNESS SAID THE AIRCRAFT ROLLED INVERTED DURING ONE SPINNING TURN BUT RETURNED TO AN UPRIGHT ATTITUDE BEFORE COLLIDING WITH THE TERRAIN. EXAM OF THE PROPELLERS INDICATED THAT THE LEFT PROPELLER WAS FEATHERED. EXAM OF THE ENGINES DID NOT DISCLOSE ANY MALFUNCTIONS.

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

INSTRUCTOR PILOT'S INABILITY TO RECOVER CONTROL OF THE AIRCRAFT AFTER IT ENTERED A SPIN.

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