Premium research interface

The modern interface for aviation safety intelligence.

Search investigations, review source evidence, monitor watched reports, and trace long-term patterns from one calm, data-first workspace.

63k+
Reports indexed
1940-2026
Coverage
Recent
Last data refresh
Featured Report

Loading…

Loading featured report…

Loading…
Open Report

Safety trends by operating rule

Track fatal and non-fatal accident patterns across Part 91, Part 135, and Part 121 operations.

Loading trend charts…

Browse the aviation graph

Move quickly by aircraft, airport, operator, and time with indexes built for research, not wandering.

Last Data Update

By Decade

By Month

Aircraft Manufacturer

More manufacturers

Airports

More airports

Operators

More operators

About

Aviation safety reports, made easier to study

NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

The goal is practical safety education: make it faster to find relevant investigations, compare similar events, review factual records, and understand the evidence behind probable-cause and preliminary reports.

The investigative work and source records belong to the National Transportation Safety Board and the published investigation record. This site is not affiliated with or endorsed by the NTSB.

FAQs

NTSB Report

July 23, 2016 · Engineering & Research 415 D · N2377H

Collinsville, OK

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
July 23, 2016
Injury Outcomes
No injuries (2 uninjured)
Location
Collinsville, OK
Aircraft
Engineering & Research 415 D (1946)
Tail Number
N2377H
Injuries
None
Aircraft Damage
Substantial
NTSB Number
GAA16CA395

The pilot reported that during the takeoff rotation, the nose came up and the left wing rose, but as he looked to the right wing it appeared low and "the next thing he knew" the airplane was going about 45 degrees across the runway to the right, headed for a tree. The pilot further reported that he reduced throttle and applied the brakes while turning left to no avail. The airplane subsequently impacted a tree and spun clockwise about 90 degrees sustaining substantial damage to the right wing and aft fuselage. The pilot reported that there were no pre impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation. The pilot recommended that due to the density altitude and low powered airplane it may not have been a good condition for departure.

NTSB Probable Cause

The pilot's failure to maintain directional control during takeoff in a high density altitude condition, which resulted in a runway excursion and impact with a tree.

Full Narrative

The pilot reported that during the takeoff rotation, the nose came up and the left wing rose, but as he looked to the right wing it appeared low and "the next thing he knew" the airplane was going about 45 degrees across the runway to the right, headed for a tree. The pilot further reported that he reduced throttle and applied the brakes while turning left to no avail. The airplane subsequently impacted a tree and spun clockwise about 90 degrees sustaining substantial damage to the right wing and aft fuselage. The pilot reported that there were no pre impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation. The pilot recommended that due to the density altitude and low powered airplane it may not have been a good condition for departure.

Flight

Event TypeAccident
Event Time12:00 CDT
Nearest AirportSandridge Airpark Inc (0nm S)
Runway17
Runway Length2545 ft
Runway Width110 ft
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftEngineering & Research 415 D
Tail NumberN2377H
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsCont Motor · C85-12 · Reciprocating · 85
Seats2

People & Injuries

Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 71 · Third Class · None
Crew 2None

Conditions

ConditionsVMC
LightDaylight
Wind210° @ 8 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point68 F
Altimeter29.92 inHg
Observation Time17:53
Weather SourceWFAC

Appendix: Source Data