CROSBYTON, TX, USA
N27007
BEECH V35
THE AIRCRAFT ENGINE FAILED, AFTER A COMPLETE LOSS OF OIL, DUE TO AN UNDERTORQUED OIL COOLER TO ENGINE ASSEMBLY THAT PERMITTED THE OIL TO BYPASS THE SEAL. THE ENGINE HAD BEEN IN SERVICE 162 HOURS SINCE OVERHAUL AND 3 HOURS SINCE ANNUAL INSPECTION. THE PILOT EXECUTED A FORCED LANDING TO ROUGH TERRAIN THAT CAUSED THE MAIN GEAR TO SHEAR, NOSE GEAR TO COLLAPSE, AND THE AIRCRAFT TO NOSE OVER.
IMPROPER OVERHAUL OF THE AIRCRAFT ENGINE BY MAINTENANCE PERSONNEL THAT LED TO THE COMPLETE LOSS OF ENGINE OIL DUE TO AN UNDERTORQUED OIL COOLER ASSEMBLY. FACTORS IN THE ACCIDENT WERE THE FAILURE OF MAINTENANCE PERSONNEL TO DETECT THE CONDITION DURING THE ANNUAL INSPECTION AND THE UNSUITABLE TERRAIN FOR THE FORCED LANDING.
Source: NTSB Aviation Accident Database
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