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

August 3, 1982 · Cessna U206B · N4991F

Grass Valley, CA

Overview

Report Status
Preliminary report
Event Type
Accident
Date
August 3, 1982
Injury Outcomes
No injuries (1 uninjured)
Location
Grass Valley, CA
Aircraft
Cessna U206B
Tail Number
N4991F
Operator
Charles L Butt
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX82DA288

DURING ARRIVAL, THE PILOT ENTERED THE TRAFFIC PATTERN TO LAND ON RUNWAY 25 WITH A REPORTED WIND FROM THE SOUTHWEST AT 10 KTS. ON HIS FIRST APPROACH, THE PILOT EXPERIENCED A ROUGH RIDE WITH FLUCTUATING AIRSPEED AND RATE OF DESCENT. HE WAS OVERSHOOTING SO HE MADE A GO-AROUND. AFTER A SECOND APPROACH, THE AIRCRAFT TOUCHED DOWN AND STARTED A ROLL-OUT. THE PILOT REPORTED THAT THE PLANE THEN BECAME AIRBORNE AGAIN, AS IF IT HAD ENCOUNTERED A GUST OR WIND SHEAR. SUBSEQUENTLY, THE AIRCRAFT LANDED HARD, SHEARING OFF THE NOSE GEAR.

Full Narrative

DURING ARRIVAL, THE PILOT ENTERED THE TRAFFIC PATTERN TO LAND ON RUNWAY 25 WITH A REPORTED WIND FROM THE SOUTHWEST AT 10 KTS. ON HIS FIRST APPROACH, THE PILOT EXPERIENCED A ROUGH RIDE WITH FLUCTUATING AIRSPEED AND RATE OF DESCENT. HE WAS OVERSHOOTING SO HE MADE A GO-AROUND. AFTER A SECOND APPROACH, THE AIRCRAFT TOUCHED DOWN AND STARTED A ROLL-OUT. THE PILOT REPORTED THAT THE PLANE THEN BECAME AIRBORNE AGAIN, AS IF IT HAD ENCOUNTERED A GUST OR WIND SHEAR. SUBSEQUENTLY, THE AIRCRAFT LANDED HARD, SHEARING OFF THE NOSE GEAR.

Flight

Event TypeAccident
Event Time14:10 PDT
Nearest AirportNevada County Airpark (0nm N)
Runway25
Runway Length3920 ft
Runway Width50 ft
Flight Plan FiledVFR
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftCessna U206B
Tail NumberN4991F
Aircraft CategoryAir
DamageSubstantial
OperatorCharles L Butt
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · IO-520A · Reciprocating · 300
Seats6

People & Injuries

Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 48 · Third Class

Conditions

ConditionsVMC
LightDaylight
Wind225° @ 10 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point18 C / 0 C
Altimeter29.00 inHg

Appendix: Source Data