ASN Wikibase Occurrence # 352350
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| Date: | Friday 12 November 1999 |
| Time: | 18:38 LT |
| Type: |  American General AG-5B Tiger |
| Owner/operator: | Private |
| Registration: | N1195L |
| MSN: | 10095 |
| Year of manufacture: | 1992 |
| Total airframe hrs: | 1022 hours |
| Engine model: | Lycoming O-360-A4K |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Van Nuys, CA -
 United States of America
|
| Phase: | Approach |
| Nature: | Unknown |
| Departure airport: | (KVNY) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
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.
Probable Cause: 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.
Accident investigation:
 |
|
Sources:
NTSB LAX00LA035
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 07-Mar-2024 11:17 | ASN Update Bot | Added |
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