NTSB Identification: BFO93LA162.
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Accident occurred Monday, September 06, 1993 in CHERRYVILLE, PA
Probable Cause Approval Date: 07/25/1994
Aircraft: STERNER SUPER CAT, registration: N531SC
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

DURING TAKE-OFF CLIMB, AT ABOUT 150 FEET ABOVE THE GROUND, THE AIRPLANE'S ENGINE LOST PARTIAL POWER. THE AIRPLANE DID NOT HAVE ENOUGH AIRSPEED OR ALTITUDE TO LAND AT THE DEPARTED AIR FIELD, AND THERE WAS NOT ENOUGH POWER TO SUSTAIN FLIGHT. DURING THE DESCENT, THE AIRPLANE COLLIDED WITH TREES. POST ACCIDENT EXAMINATION OF THE ENGINE REVEALED THAT AN EXTERNALLY MOUNTED IN-LINE FUEL FILTER, MANUFACTURED BY PUROLATOR, PART NUMBER PRO-804, WAS RESTRICTING FUEL FLOW. FURTHER EXAMINATION OF THE FUEL FILTER REVEALED THAT THE FUEL FILTER'S ELEMENT RETENTION THUMBSCREW HAD LOOSENED AND ROTATED DOWN COVERING ABOUT 80 PERCENT OF THE FUEL INLET OPENINGS.

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

THE MOVEMENT OF A THUMBSCREW ON THE FUEL FILTER SYSTEM WHICH RESULTED IN FUEL FLOW BLOCKAGE AND SUBSEQUENT PARTIAL POWER LOSS. A FACTOR IN THIS ACCIDENT WAS THE LACK OF SUITABLE TERRAIN FOR THE EMERGENCY LANDING.

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