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ASN Wikibase Occurrence # 148603
Last updated: 11 December 2017
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Date:03-SEP-2012
Time:
Type:Silhouette image of generic SVNH model; specific model in this crash may look slightly different
Skykits Savannah ADV
Owner/operator:Joseph Tugaw
Registration: N9764J
C/n / msn: 07-07-51-621
Fatalities:Fatalities: 1 / Occupants: 1
Airplane damage: Substantial
Category:Accident
Location:18 miles up Dry Creek Canyon, Cassia County, south of Murtaugh, ID -   United States of America
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Nature:Private
Departure airport:Twin Falls, ID
Destination airport:Twin Falls, ID
Investigating agency: NTSB
Narrative:
The pilot was flying over his mountainous ranch property to check on his cattle following a fire. When he did not return, the family reported him overdue. The wreckage was subsequently found on the ranch property at an elevation of about 7,115 feet mean sea level. The density altitude at ground level was estimated to be about 12,495 feet; the operating limitations for the airplane state that the maximum ceiling is about 14,000 feet pressure altitude at maximum weight. On-site wreckage documentation indicated that the airplane collided with terrain in a nearly vertical attitude. Because of the high density altitude on the day of the accident and the elevation of the terrain, the pilot had little altitude within which to operate before reaching the airplane's maximum ceiling. It is likely that, while maneuvering the airplane near or above the airplane's maximum ceiling, the pilot failed to maintain adequate airspeed, which resulted in a stall and a subsequent loss of control. A postaccident examination of the airframe and engine revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation.
Probable Cause: The pilot's failure to maintain adequate airspeed while maneuvering at or above the airplane's maximum ceiling, which resulted in a stall and a subsequent loss of airplane control. Contributing to the accident was the pilot's decision to operate the airplane in the high density altitude conditions, which placed the airplane near or above its maximum ceiling.

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20120904X22203&key=1
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N9764J


Revision history:

Date/timeContributorUpdates
04-Sep-2012 12:24 gerard57 Added
04-Sep-2012 18:41 Geno Updated [Time, Aircraft type, Registration, Cn, Location, Phase, Source, Narrative]
07-Sep-2012 23:36 Geno Updated [Phase, Departure airport, Destination airport, Source]
21-Dec-2016 19:28 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
02-Feb-2017 17:32 rvargast17 Updated [Damage, Narrative]
28-Nov-2017 13:26 ASN Update Bot Updated [Time, Operator, Other fatalities, Departure airport, Destination airport, Source, Damage, Narrative]

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