NTSB Identification: SEA91FA075.
The docket is stored on NTSB microfiche number 44189.
Accident occurred Sunday, March 31, 1991 in SEATTLE, WA
Probable Cause Approval Date: 02/08/1993
Aircraft: ROBINSON R-22 BETA, registration: N2631V
Injuries: 1 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.

THE ACFT WAS ON VFR FINAL APPR AT 100 FT AGL WHEN IT ROLLED OVER, DESCENDED UNCONTROLLED, AND IMPACTED THE ROOF OF A WHSE. THE IMPACT BROKE A SKYLIGHT IN THE ROOF AND THE ACFT FELL THROUGH THE HOLE, COMING TO REST INSIDE THE WHSE. ROCKS, HAND TOOLS, AND A LARGE UNSECURED TREE STUMP WERE IN THE ACFT CABIN. THE STUMP HAD A FRESH SCAR AND BLACK PAINT SMEARS ADJACENT TO THE CYCLIC CONTROL STICK. A SCREW HEAD IN THE BLACK CYCLIC STICK WAS FILLED WITH WOOD SPLINTERS.

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

THE LOSS OF CONTROL IN FLIGHT BY THE PILOT DUE TO HIS IMPROPER PREFLIGHT PREPARATION IN FAILING TO SECURE CARGO WHICH SHIFTED IN FLIGHT AND INTERFERED WITH THE MOVEMENT OF THE CYCLIC CONTROL STICK.

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