Mid-air collision Accident ICP Savannah N991TP, 12 Oct 2014
ASN logo
ASN Wikibase Occurrence # 170455
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information. If you feel this information is incomplete or incorrect, you can submit corrected information.

Type:Silhouette image of generic SVNH model; specific model in this crash may look slightly different    
ICP Savannah
Registration: N991TP
MSN: 04-06-51-297
Fatalities:Fatalities: 1 / Occupants: 1
Aircraft damage: Written off (damaged beyond repair)
Location:Lyon County, NW of Wabuska, Nevada -   United States of America
Phase: Unknown
Departure airport:Yerington, NV (N/A)
Destination airport:Carson City, NV (CXP)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
A Cessna 170B and a Pettit Savannah collided in midair shortly after both took off from the same airstrip. The airplanes were the second and third airplanes in a group of three airplanes whose pilots planned to depart from a fly-in at the airstrip, form up together in the traffic pattern, and then depart the area. The first airplane took off and turned left 180 degrees onto the downwind leg of the traffic pattern, and it was followed by the Cessna. Subsequently, the Savannah took off on a heading about 45 degrees to the left of the airstrip's heading and entered a climbing left turn. Witnesses reported that when the airplanes collided, the Cessna was flying level on a westerly heading on the downwind leg, and the Savannah was on about a north heading in a climbing left turn. The witnesses observed the airplanes collide at nearly a perpendicular angle.

Postaccident examination of the airplanes' wreckage revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation of either airplane. A collision angle calculated from paint transfer and scratches on the Savannah's right wing indicated that the airplanes collided at an angle of about 90 degrees, consistent with the witness reports.

The evidence indicated that the Savannah pilot attempted a join-up maneuver without maintaining adequate awareness of the Cessna's position. Before the collision occurred, the Savannah was in a climbing left turn and likely could not see the Cessna. The Savannah's pilot should have executed a clearing procedure during climb out to verify the position of the Cessna before attempting the join up. Also, had the Cessna's pilot executed a clearing procedure while on downwind, he might have been able to observe the Savannah as it was departing.

The Savannah pilot's toxicology testing identified diphenhydramine, tramadol, mefloquine, and trazodone in the muscle and liver. Additionally, tetrahydrocannabinol (THC) and its inactive metabolite tetrahydrocannabinol carboxylic acid were detected in the lung, liver, and brain. The investigation was unable to determine why the pilot was using mefloquine or if he had any adverse effects from the medication. The combined effects of diphenhydramine, tramadol, trazodone, and THC, all of which cause sedation, likely impaired the Savannah pilot's decision-making.

Probable Cause: The failure of the Savannah pilot to maintain awareness of the position of the Cessna while attempting a join up maneuver. Contributing to the accident was the impaired decision-making of the Savannah's pilot due to the combined effects of licit and illicit medications. Also contributing to the accident was the failure of the Cessna pilot to maintain awareness of the position of the Savannah as it was departing.


FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N991TP


Revision history:

13-Oct-2014 01:30 Geno Added
13-Oct-2014 01:35 Geno Updated [Total fatalities]
14-Oct-2014 17:29 Geno Updated [Aircraft type, Registration, Cn, Operator, Source, Narrative, Plane category]
14-Oct-2014 21:07 Alpine Flight Updated [Time, Aircraft type]
21-Dec-2016 19:28 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
30-Nov-2017 19:28 ASN Update Bot Updated [Operator, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative]

Corrections or additions? ... Edit this accident description

The Aviation Safety Network is an exclusive service provided by:
Quick Links:

CONNECT WITH US: FSF Facebook FSF Twitter FSF Youtube FSF LinkedIn FSF Instagram

©2023 Flight Safety Foundation

1920 Ballenger Av., 4th Fl.
Alexandria, Virginia 22314