Individually Owned: 150,657
Corporate Owned: 137,281
Van Nuys Airport
Aircraft Accident/Incident Report
Van Nuys, California 91406
Friday, November 12, 1999 17:38 PST
NTSB Narrative Summary Released at Completion of Accident
The outboard 1/3 of the aircraft's left wing was deformed upward about 5 degrees with respect to the inboard section during an encounter with wake turbulence while on downwind leg for landing. The upper wing skins of both wings exhibited compression buckling, and the mass balance weights on both ailerons were separated and fell from the aircraft. The pilot reported that the flight was unremarkable until, while downwind for landing, there was an instantaneous jolt of sudden severe turbulence that ended before he could take any action. Data obtained from the airport noise abatement office showed that 2 minutes 23 seconds prior to the encounter, a heavy transport aircraft passed over the location on an ILS approach to another airport 6 miles away; the transport airplane was about 500 feet higher than the accident airplane as it crossed the location. The air traffic control tower at the airport where the accident occurred made a wake turbulence cautionary broadcast to all aircraft 30 seconds prior to when the accident aircraft first contacted the tower for landing. The cautionary broadcast was not repeated.
NTSB Probable Cause Narrative
The pilot's encounter with unknown and unanticipated wake turbulence from a heavy transport aircraft, which was landing at another airport. A factor in the accident was the tower controller's failure to repeat a previously broadcast wake turbulence cautionary advisory when the aircraft later checked in on tower frequency.
Event Information
| Type of Event | Accident |
| Event Date | 11/12/1999 |
| Event Day of the Week | Friday |
| Time of Event | 1738 |
| Event Time Zone | Pacific Standard Time |
| Event City | VAN NUYS |
| Event State | CALIFORNIA |
| Event Country | -- |
| Zipcode of the event site | 91406 |
| Event Date Year | 1999 |
| Event Date Month | 11 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | -- |
| Event Location Longitude | -- |
| Event Location Airport | VAN NUYS |
| Event Location Nearest Airport ID | VNY |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | 1 |
| Degrees magnetic from airport | 90 |
| Airport Elevation | 799 |
| Weather Briefing Completeness | Full |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1751 Pacific Standard Time |
| Direction of event from weather observation facility (degrees) | 270 |
| Weather Observation Facility ID | VNY |
| Elevation of weather observation facility | 799 |
| Distance of event from weather observation facility (units?) | 1 |
| Time Zone of the weather observation | PST |
| Lighting Conditions | Night/Bright |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Clear |
| 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) | 22 |
| Dew Point at event time (in degress fahrenheit) | 8 |
| Wind Direction (degrees magnetic) | 0 |
| Variable Wind Indicator | Variable |
| Wind Speed (knots) | 3 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 30 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 3 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 1850 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Nov 12 1999 12:00AM |
| NTSB Notification Time | 1900 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Aug 16 2001 5:11PM |
| User who most recently changed record | MONR |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N1195L |
| NTSB Number | LAX00LA035 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 135: Air Taxi & Commuter |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | American General Aircraft |
| Aircraft Model | AG5B |
| Aircraft Series Identifier | AG5B |
| Aircraft Serial Number | 10095 |
| Certified Max Gross Weight | 2400 |
| 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 | 4 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Dec 17 1998 12:00AM |
| Airframe hours since last inspection | 54 |
| Airframe Hours | 1022 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | DAVID P. LUNT |
| Aircraft Owner Street Address | 23448 W. SAGEBRUSH |
| Aircraft Owner City | SANTA CLARITA |
| Aircraft Owner State | CA |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 91321 |
| Operator is an individual? | -- |
| Operator Name | D&S AVIATION |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | 16700 ROSCOE BLVD |
| Operator City | VAN NUYS |
| Operator State | CA |
| Operator Country | |
| Operator Zip code | 91406 |
| Operator Code | DS6A |
| Owner has at least one certificate | Yes - certificate holder |
| 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 | Non-scheduled |
| Indicates Domestic or International Flight | Domestic |
| Operator carrying Pax/Cargo/Mail | Passenger Only |
| Type of Flying (Per_Bus / Primary) | Unknown |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | VNY |
| Departure City | |
| Departure State | |
| Departure Country | |
| Departure Time | 1645 |
| Departure Time Zone | PST |
| 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 | Approach |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Mar 10 2001 4:07AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 16L |
| Runway Length | 4000 |
| Runway Width | 75 |
| Sight Seeing flight | Yes |
| Air Medical Flight | No |
| Medical Flight | -- |