ASN Wikibase Occurrence # 70392
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| Date: | Wednesday 22 April 1987 |
| Time: | 16:00 |
| Type: |  Schweizer SGS 2-33 |
| Owner/operator: | Private |
| Registration: | N11468 |
| MSN: | |
| Total airframe hrs: | 7817 hours |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Mokuleia, Oahu, HI -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING A LOCAL SIGHTSEEING FLT ALONG A RIDGE LINE, WHILE MANEUVERING AROUND A CLOUD BUILD-UP, THE ACFT ENTERED A WINDSHEAR THAT SUDDENLY NOSED THE ACFT OVER IN AN APRX 75 DEG VERTICAL DIVE. JUST PRIOR TO COLLIDING WITH TREES, THE PLT WAS ABLE TO REGAIN SOME CONTROL OF THE ACFT AND COLLIDED WITH THE TERRAIN IN AN APRX 45 DEG ATTITUDE. IN THESE MOUNTAINS A CATABATIC WIND OFTEN FLOWS DOWNSLOPE AS SOLAR HEAT IS RADIATED FROM THE TERRAIN, COOLING THE TERRAIN SURFACE. THE TRADE WINDS CROSS THE RIDGES OBLIQUELY RESULTING IN EDDIES THAT PRODUCE OFF RIDGE FLOW. WHEN THE EDDIES AND CATABATIC GUSTS COINCIDE, A WIND SHEAR CAN OCCUR.
Sources:
NTSB Identification: LAX87DJA06
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 09-Dec-2009 06:01 | DColclasure | Added |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 15-Jun-2023 03:48 | Ron Averes | Updated [[Time, Damage, Category, Investigating agency]] |
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