WARRENTON, VA, USA
N9489P
PIPER PA-25-235
THE PIPER WAS TOWING A GLIDER, A SCHWEIZER SGS 2-33. DURING CLIMB ABOUT 200 FT AGL WHEN, ACCORDING TO THE TOWPLANE PLT, HIS ACFT ABRUPTLY PITCHED DOWN. THE TOWPLANE DESCENDED AND THE PLT WAS UNABLE TO RECOVER IN TIME TO AVOID THE ACFT FROM STRIKING THE GROUND. ACCORDING TO THE GLIDER PLT, DURING THE TAKEOFF CLIMB HE ENCOUNTERED AN UPDRAFT WHICH CAUSED THE GLIDER TO ACCELERATE AND CLIMB DESPITE CORRECTIVE ACTION. THE GLIDER PLT STATED THAT WHEN HE RELEASED THE TOWROPE HE HEARD A POP SOUND AND THEN THE GLIDER PITCHED UP. THE GLIDER PILOT STATED THE AIRSPEED REACHED 105 MPH AND THE GLIDER PITCHED UP TO ABOUT 50 TO 60 DEGREES. THE GLIDER REACHED ABOUT 650 AGL BEFORE IT SLOWED TO 50 MPH AFTER WHICH HE RETURNED TO LAND. INVESTIGATION REVEALED THE GLIDER PILOT HAD 17 HRS TOTAL TIME IN GLIDERS; HOWEVER, UNTIL THE DAY OF THE ACCIDENT HE HAD NOT FLOWN GLIDERS FOR ABOUT 2 YRS. THIS WAS HIS THIRD FLIGHT OF THE DAY AND THE FIRST ONE WITHOUT AN INSTRUCTOR ABOARD.
THE FAILURE OF THE GLIDER PILOT TO MAINTAIN A PROPER CLIMB RATE DURING TAKEOFF AND THE DELAY IN RELEASING FROM THE TOWPLANE AFTER REALIZING THAT HE WAS CLIMBING WELL ABOVE THE TOWPLANE. CONTRIBUTING TO THE ACCIDENT WAS THE UPDRAFT ENCOUNTERED AFTER TAKEOFF AND THE LACK OF RECENT EXPERIENCE OF THE GLIDER PILOT.
Source: NTSB Aviation Accident Database
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