DECATUR, TX, USA
N22FD
SIAI-MARCHETTI SF260B
AN ITALIAN BUILT MILITARY TRAINER EXPERIENCED A CATASTROPHIC ENGINE FAILURE DURING A DEMONSTRATION FLIGHT FOR A PROSPECTIVE BUYER. THE ENGINE FAILURE WAS THE RESULT OF THE FAILURE OF THE ENGINE OIL PUMP SHAFT. WHILE ATTEMPTING A FORCED LANDING TO A TWO LANE HIGHWAY, A HIGH RATE OF DESCENT DEVELOPED DURING AN INADVERTENT STALL AND THE AIRPLANE IMPACTED AN EMBANKMENT ON THE SHOULDER OF THE ROAD, EXPLODED AND BURNED. A 1975 SERVICE BULLETIN RECOMMENDED REPLACEMENT OF THE FAILED SHAFT WITH AN IMPROVED SHAFT.
THE LOSS OF ENGINE POWER AS THE RESULT OF THE FAILURE OF THE ENGINE OIL PUMP. FACTORS WERE NON COMPLIANCE WITH A SERVICE BULLETIN, THE LACK OF SUITABLE TERRAIN, AND INADVERTENT STALL.
Source: NTSB Aviation Accident Database
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