NTSB Identification: FTW92FA152.
The docket is stored on NTSB microfiche number 47215.
Accident occurred Sunday, June 07, 1992 in DECATUR, TX
Probable Cause Approval Date: 06/30/1993
Aircraft: SIAI-MARCHETTI SF260B, registration: N22FD
Injuries: 2 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.

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

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.

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