Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Warrenton, Virginia 22186
Saturday, May 20, 1989 12:39 EDT
NTSB Narrative Summary Released at Completion of Accident
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.
NTSB Probable Cause Narrative
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.
Event Information
| Type of Event | Accident |
| Event Date | 5/20/1989 |
| Event Day of the Week | Saturday |
| Time of Event | 1239 |
| Event Time Zone | Eastern Daylight Time |
| Event City | WARRENTON |
| Event State | VIRGINIA |
| Event Country | -- |
| Zipcode of the event site | 22186 |
| Event Date Year | 1989 |
| Event Date Month | 5 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | |
| Event Location Nearest Airport ID | |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | 0 |
| Airport Elevation | -- |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 0 |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | IAD |
| Elevation of weather observation facility | 0 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 20000 |
| Sky/Lowest/Cloud Conditions | Thin Broken |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 28 |
| Dew Point at event time (in degress fahrenheit) | 12 |
| Wind Direction (degrees magnetic) | 180 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 16 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 29 |
| Density Altitude (feet) | 2000 |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | Minor |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | 1 |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 355 |
| NTSB Notification Source | -- |
| NTSB Notification Date | -- |
| NTSB Notification Time | 0 |
| Fiche Number and/or location -used to find docket information | 38734 |
| Date of most recent change to record | Dec 13 2000 12:40PM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N9489P |
| NTSB Number | BFO89LA035 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | PIPER |
| Aircraft Model | PA-25-235 |
| Aircraft Series Identifier | PA-25-235 |
| Aircraft Serial Number | 25-7405589 |
| Certified Max Gross Weight | 2900 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 1 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Jan 8 1989 12:00AM |
| Airframe hours since last inspection | 45 |
| Airframe Hours | 3135 |
| ELT Installed | No |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | WARRENTON SOARING CENTER |
| Aircraft Owner Street Address | P.O. BOX 769 |
| Aircraft Owner City | WARRENTON |
| Aircraft Owner State | VA |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 22186 |
| Operator is an individual? | -- |
| Operator Name | |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | |
| Operator City | |
| Operator State | |
| Operator Country | |
| Operator Zip code | |
| Operator Code | |
| Owner has at least one certificate | None |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | Unknown |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | -- |
| Indicates Domestic or International Flight | -- |
| Operator carrying Pax/Cargo/Mail | -- |
| Type of Flying (Per_Bus / Primary) | Other Work Use |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | |
| Departure City | |
| Departure State | |
| Departure Country | |
| Departure Time | 1238 |
| Departure Time Zone | EDT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | |
| Destination City | |
| Destination State | |
| Destination Country | |
| Specific Phase of Flight | Descent |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:35AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 0 |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |