Individually Owned: 150,657
Corporate Owned: 137,281
Pleasant Valley Airport
Aircraft Accident/Incident Report
Peoria, Arizona 85382
Thursday, May 11, 1995 14:20 MST
NTSB Narrative Summary Released at Completion of Accident
A WITNESS STATED THAT THE TOW PLANE ENCOUNTERED A 'DUST DEVIL' BETWEEN 100 AND 200 FEET AGL. HE THEN SAW THE GLIDER ENCOUNTER THE 'DUST DEVIL' AND GAIN ALTITUDE ABOVE THE TOW PLANE UNTIL THE TOW ROPE FORMED A 30- TO 45-DEGREE ANGLE. THE NOSE OF THE TOW PLANE THEN DROPPED AND THE AIRCRAFT DESCENDED TO THE GROUND. THE TOW ROPE WAS FOUND TO HAVE SEPARATED AFT OF THE TOW PLANE TOW RING. THE ROPE, WITH THE TOW RING ATTACHED, WAS LOCATED NEAR THE AIRCRAFT. THE REMAINDER OF THE ROPE, WITH THE GLIDER TOW RING ATTACHED, WAS FOUND BACK ALONG THE FLIGHT PATH. AN INSPECTION OF THE TOW PLANE HOOK RELEASE MECHANISM FOUND IT TO BE IN THE OPEN POSITION. THE MECHANISM OPENED ON IMPACT BASED ON THE SEPARATION OF THE TOW ROPE AND THE PROXIMITY OF THE ROPE TO THE TOW PLANE HOOK, AS WELL AS THE APPARENT SNAP BACK OF THE REMAINDER OF THE ROPE AWAY FROM THE CRASH SITE.
NTSB Probable Cause Narrative
the pilot's inflight loss of control due to his delay in releasing the glider after the towed glider experienced an unplanned altitude gain on takeoff when it encountered a dust devil.
Event Information
| Type of Event | Accident |
| Event Date | 5/11/1995 |
| Event Day of the Week | Thursday |
| Time of Event | 1420 |
| Event Time Zone | Mountain Standard Time |
| Event City | PEORIA |
| Event State | ARIZONA |
| Event Country | -- |
| Zipcode of the event site | 85382 |
| Event Date Year | 1995 |
| Event Date Month | 5 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | PLEASANT VALLEY AIRPORT |
| Event Location Nearest Airport ID | AZ05 |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | 230 |
| Airport Elevation | 1530 |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1445 Mountain Standard Time |
| Direction of event from weather observation facility (degrees) | 120 |
| Weather Observation Facility ID | DVT |
| Elevation of weather observation facility | 1476 |
| Distance of event from weather observation facility (units?) | 13 |
| Time Zone of the weather observation | MST |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 25000 |
| Sky/Lowest/Cloud Conditions | Thin Overcast |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 35 |
| Air Temperature at event time (in degrees celsius) | 29 |
| Dew Point at event time (in degress fahrenheit) | 1 |
| Wind Direction (degrees magnetic) | 220 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 10 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 29 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | Fatal |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | 1 |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 829 |
| NTSB Notification Source | -- |
| NTSB Notification Date | May 11 1995 12:00AM |
| NTSB Notification Time | 1549 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Dec 7 2000 4:16PM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N7403Z |
| NTSB Number | LAX95LA183 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Destroyed |
| Aircraft Fire | Ground |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | PIPER |
| Aircraft Model | PA-25-235 |
| Aircraft Series Identifier | PA-25-235 |
| Aircraft Serial Number | 25-3369 |
| 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 | 100 Hour |
| Date of Last Inspection | May 2 1995 12:00AM |
| Airframe hours since last inspection | 50 |
| Airframe Hours | 6126 |
| ELT Installed | No |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | BABOQUIVARI SOARING SCHOOL INC |
| Aircraft Owner Street Address | 8700 WEST CAREFREE HIGHWAY |
| Aircraft Owner City | PEORIA |
| Aircraft Owner State | AZ |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 85382 |
| Operator is an individual? | -- |
| Operator Name | |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| 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 | AZ05 |
| Departure City | |
| Departure State | |
| Departure Country | |
| Departure Time | 1424 |
| Departure Time Zone | MST |
| 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 | Takeoff |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:34AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 23L |
| Runway Length | 4000 |
| Runway Width | 120 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |