Aviation Accident Summaries

Aviation Accident Summary ATL89LA135

BROOKS, GA, USA

Aircraft #1

N52652

BOEING A75N1

Analysis

THE 2970' RWY (ELEVATION 820') WAS MOSTLY SURROUNDED BY TREES. WITH A TEMP OF ABOUT 81 DEG, THE ESTIMATED DENSITY ALT WAS 2700'. AS THE PLT & PSGR WERE TAXIING TO RWY 2 TO TAKE OFF, THE WIND SOCK, WHICH WAS LOCATED BELOW THE TREE TOPS, WAS NOTED TO BE LIMP. THE PLT RPRTD THAT DURING TAKEOFF, LIFT-OFF WAS AT 65 MPH AFTER AN APRX 600' ROLL & A CLIMB WAS ESTABD AT 75 TO 80 MPH. HOWEVER, AS THE ACFT CLIMBED ABV THE TREES, A LEFT DRIFT WAS ENCTRD & THE ACFT STOPPED CLIMBING,ALTHOUGH THERE WAS NO APPARENT ENG PROBLEM. BY THIS TIME, THERE WAS INSUFFICIENT RWY REMAINING TO ABORT & THE ACFT WAS APCHG TREES NEAR THE END OF THE RWY. THE PLT TRADED AIRSPEED FOR ALT TO CLEAR THE TREES & THEN THE ACFT BEGAN TO MUSH. SUBSEQUENTLY, IT SETTLED INTO SMALLER TREES & CAME TO REST WITH SUBSTANTIAL DMG. THE PLT BELIEVED THE ACFT ENCTRD A QUARTERING TAILWIND & A DOWNDRAFT AS IT WAS CLIMBING ABV THE TREES DURING TAKEOFF & SUBSEQUENTLY GOT BEHIND THE POWER CURVE.

Probable Cause and Findings

CLIMB NOT POSSIBLE BECAUSE OF A DOWNDRAFT WHICH EXCEEDED THE PERFORMANCE CAPABILITIES OF THE AIRPLANE. FACTORS RELATED TO THE ACCIDENT WERE: INADEQUATE LOCATION OF THE WIND SOCK, THE ADVERSE WIND CONDITIONS, AND THE TREES.

 

Source: NTSB Aviation Accident Database

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