ASN Wikibase Occurrence # 174136
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| Date: | Monday 9 February 2015 |
| Time: | 17:00 |
| Type: |  Beechcraft B300 King Air |
| Owner/operator: | West Coast Charters Inc |
| Registration: | N49WC |
| MSN: | FL-144 |
| Year of manufacture: | 1996 |
| Total airframe hrs: | 9205 hours |
| Engine model: | Pratt & Whitney PT6A-60A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Mammoth Yosemite Airport (KMMH), Mammoth Lakes, CA -
 United States of America
|
| Phase: | Approach |
| Nature: | Ferry/positioning |
| Departure airport: | Santa Ana, CA (SNA) |
| Mammoth Lakes, CA (MMH) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that while in a descent from 16,000 feet, at 1,500 feet per minute, slowing from 190 knots indicated airspeed to 160 knots, the airplane encountered extreme turbulence. The pilot reported one hard jolt up/down followed by about 15 seconds of light turbulence then one final hard jolt similar to the first. The weather was visual conditions and no turbulence was encountered prior to or after the event. A postflight examination of the airplane revealed that the extreme turbulence encountered resulted in substantial structural damage to both wings spars.
The pilot reported there were no pre-impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.
Probable Cause: The airplane encountered extreme turbulence during descent.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N49WC
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 26-Feb-2015 18:04 | Geno | Added |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 01-Dec-2017 12:35 | ASN Update Bot | Updated [Operator, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative] |
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