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ASN Wikibase Occurrence # 164213
Last updated: 31 October 2020
This record has been locked for editing.

Date:22-FEB-2014
Time:18:06
Type:Silhouette image of generic RV9 model; specific model in this crash may look slightly different
Van's RV-9A
Owner/operator:Private
Registration: N7872
C/n / msn: 91275
Fatalities:Fatalities: 1 / Occupants: 1
Other fatalities:0
Aircraft damage: Substantial
Category:Accident
Location:West of Tribune Municipal Airport (5K2), Tribune, KS -   United States of America
Phase: Unknown
Nature:Private
Departure airport:Tribune, KS (5K2)
Destination airport:Tribune, KS (5K2)
Investigating agency: NTSB
Narrative:
According to data recorded by the experimental, amateur-built airplane’s multifunction displays, about 10 minutes after the airplane took off for the personal flight, it entered two sequential 360-degree left turns with gravitational accelerations (g) of 2.10 g and 2.80 g, respectively. The airplane then entered its final left turn with an acceleration of 3.20 g, passed through about 180 degrees, and subsequently descended into terrain. Examination of the airplane wreckage revealed no mechanical anomalies that would have precluded normal operation.
A review of the private pilot's primary care physician and neurologist records revealed that the pilot had a 10-month history of a rapidly progressive neurological disorder that affected his muscle movements. Three months before the accident, the primary care physician advised the pilot not to drive or fly due to his impaired response time. Four days before the accident, the neurologist noted that the pilot had asymmetric moderate rigidity in his arms and severely slowed movements generally. The postmortem neuropathology analysis identified widespread degenerative disease in multiple areas of the brain. It is likely that the pilot’s neurologic disorder impaired his ability to safely operate the airplane.
Probable Cause: The pilot’s failure to maintain airplane control while conducting high-g turns, which resulted in impact with terrain. Contributing to the accident was the pilot’s improper decision to initiate the flight with a severe progressive neurological disorder that likely impaired his ability to safely operate the airplane.

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20140224X00624&key=1
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=7872


Revision history:

Date/timeContributorUpdates
23-Feb-2014 16:43 Geno Added
23-Feb-2014 20:21 Alpine Flight Updated [Time, Aircraft type, Damage, Narrative]
24-Feb-2014 20:32 Geno Updated [Source, Damage, Narrative]
06-Mar-2014 01:57 Geno Updated [Nature, Departure airport, Source]
21-Dec-2016 19:28 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
29-Nov-2017 13:33 ASN Update Bot Updated [Other fatalities, Departure airport, Destination airport, Source, Narrative]