SIMI, CA, USA
N3124
THORP T-18
THE ACFT CRASHED IN A SCHOOL PLAYGROUND IN A STEEP UNCONTROLLED DESCENT. WITNESSES SAID THE ACFT WAS OBSERVED IN A 60 DEGREE NOSE DOWN ATTITUDE AT ABOUT 1000 FT AGL AND THIS CONTINUED UNTIL GROUND IMPACT. THE ENGINE WAS PRODUCING HIGH POWER AT THIS TIME. NO WITNESSES SAW THE ACFT BEFORE THE DIVE. EXAMINATION REVEALED THAT THE COCKPIT CONTROL STICK HAD FAILED AND THE AILERON AND STABILATOR CROSS-BAR RIGHT MOUNTING POST TUBE WELDED AREA FAILED PRIOR TO THE ACCIDENT. A PRE-EXISTING CRACK HAD EXISTED FOR SOME TIME ON THE CROSS-BAR TUBE WHEN THIS TUBE FAILED THE FLT CONTROLS JAMMED WHICH PREVENTED THE PLT FROM CONTROLLING THE ACFT.
Source: NTSB Aviation Accident Database
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