NTSB Identification: SEA87LA168.
The docket is stored on NTSB microfiche number 34828.
Accident occurred Monday, August 17, 1987 in KENT, WA
Probable Cause Approval Date: 10/07/1988
Aircraft: BEECH G35, registration: N4235D
Injuries: 2 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.

SHORTLY AFTER ROTATION A PROPELLER BLADE SEPARATED FROM THE AIRCRAFT WITH THE REMAINING PROPELLER HUB ASSEMBLY AND THE OTHER BLADE ALSO FALLING FROM THE AIRCRAFT. THE PILOT WAS ABLE TO LAND THE AIRCRAFT STRAIGHT AHEAD ON THE REMAINING RUNWAY. THE HUB WAS OVERHAULED 7 HRS. BEFORE THE ACCIDENT. METALLURGICAL EXAMINATION OF THE PROPELLERS AND HUB ASSEMBLY REVEALED THAT THE SEPARATION OF THE BLADE FROM THE HUB WAS THE RESULT OF THE USE OF THE SEVERELY DAMAGED BLADE RETENTION NUT IN THE OVERHAULED PROPELLER.

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

PROPELLER SYSTEM/ACCESSORIES,PROP BLADE RETENTION..PREVIOUS DAMAGE

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

MAINTENANCE,OVERHAUL..IMPROPER..OTHER MAINTENANCE PERSONNEL

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

PROPELLER SYSTEM/ACCESSORIES,BLADE..SEPARATION

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