Bellanca 17 31ATC N787TV

Summary

On 24 April 2017 at about 18:39 local time, a Bellanca 17 31ATC registered N787TV was involved in an accident near Boonville, Missouri, United States. 2 people were on board and 2 died. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

24 April 2017 at 18:39

Classification

Accident

Location

Boonville, Missouri, United States

Nearest airport

Jesse Viertel Memorial (VER)

Coordinates

38.9592, -92.6814

Aircraft

Bellanca 17 31ATC

Registration

N787TV

Category

Airplane

Year built

1973

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Personal

Phase of flight

Not recorded

Route

Boonville → Boonville

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

CEN17FA164

2 people died.

The pilot's impairment, due to his use of a combination of psychoactive drugs and a vision deficiency in his left eye, which resulted in a failure to maintain adequate altitude during final approach to landing and subsequent collision with power lines.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

The commercial rated pilot was landing the airplane at the end of a personal local flight. The airport manager saw the airplane very low on final approach for runway 18. As the airplane continued toward the airport, it collided with power lines about 0.5 mile north of the runway's approach end. Weather conditions at the time of the accident included a clear sky with no obstructions to visibility. Examination of the airframe and engine did not reveal any anomalies that would have contributed to the accident. The pilot was familiar with the airport and was likely aware of the location of the power lines, which were well below a normal glideslope to the runway. The pilot did not hold a medical certificate. An autopsy of the pilot revealed coronary artery disease and significant brain pathology. It is unlikely that the pilot's coronary artery disease contributed to the accident as it would not have impaired the pilot's judgment, vision, or decision-making. The pilot had scarring from a previous brain injury and severe damage to his left optic nerve to the extent that he was nearly blind in that eye. Given that the pilot failed to maintain proper altitude while operating in visual conditions and struck a potentially visible hazard, it is likely that his vision deficiency contributed to the accident. Toxicology test results indicated that the pilot had used multiple psychoactive drugs before the accident, including cocaine, methamphetamine, clonazepam, and diphenhydramine. In addition to their psychoactive effects, these drugs are potent vasoconstrictors and can cause small arteries to spasm, cutting off blood flow to portions of vital organs. Although the neuropathologist who examined the pilot's brain believed the degree of cerebral hypoxic/ischemic damage he identified would take several hours to develop, the pilot was deceased by the time first responders arrived about 10 minutes after the witnessed crash. Therefore, this hypoxic/ischemic damage had to have begun before the accident and was likely caused by the pilot's misuse of cocaine and methamphetamine. This evolving brain ischemia may have played a role in the circumstances of the accident, but without specific information regarding the pilot's symptoms, its exact role cannot be determined. Although the pilot's stage of intoxication with methamphetamine or cocaine at the time of the accident is unknown, it is very likely that he was impaired by the combined effects of these drugs.

Quoted verbatim from the NTSB record.