NTSB Identification: LAX83FUG10
14 CFR Part 91: General Aviation
Accident occurred Saturday, December 18, 1982 in HEMET, CA
Probable Cause Approval Date: 12/18/1983
Aircraft: NORMAN NEGUS KR-2, registration: N2NN
Injuries: 2 Serious.

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 OWNER OF THE HOME BUILT AIRCRAFT WAS CHECKING OUT THE OTHER PILOT WHO WAS SECOND-IN-COMMAND (SIC). THE SIC ALSO HAD A HOME BUILT OF THE SAME MAKE AND MODEL. THE OBJECTIVE WAS TO PROVIDE FAMILIARIZATION TO THE SIC. DURING AN APPROACH TO LAND, THEY ELECTED TO GO AROUND AFTER OBSERVING ANOTHER AIRCRAFT ON THE RUNWAY. DURING THE GO-AROUND, THE ENGINE LOST POWER AND A FORCED LANDING WAS MADE IN A PLOWED FIELD. AFTER TOUCHDOWN, THE PLANE BEGAN TO COME APART, THEN FLIPPED OVER. BOTH PILOTS RECEIVED BROKEN NECKS, THE OWNER WAS PARALYZED FROM THE WAIST DOWN. AN INVESTIGATION REVEALED THAT THE CRANKSHAFT HAD FAILED AT THE CRANKARM BETWEEN THE #3 AND #4 CYLINDER CRANKPINS. THE ENGINE HAD 146 HRS TOTAL FLYING TIME.

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

ENGINE ASSEMBLY,CRANKSHAFT..FAILURE,TOTAL


Contributing Factors

TERRAIN CONDITION..SOFT

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