Overall Trends
Total, fatal, and serious accidents in the selected range.
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
Search everything
Fast key and full-text search with live filters, watches, and precise metadata.
Use quotes for exact phrase matches (for example "fuel selector valve").
Featured 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…
High-signal investigations
Major cases, deep-report coverage, and investigation media across decades of NTSB history.
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 manufacturersAirports
More airportsOperators
More operatorsAbout
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
June 3, 2006 · Burkhart Grob Flugzeugbau G103 TWIN Astir · N4464P
Llano, CA
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
June 3, 2006
Injury Outcomes
No injuries (1 uninjured)
Location
Llano, CA
Aircraft
Burkhart Grob Flugzeugbau G103 TWIN Astir
Tail Number
N4464P
Operator
Great Western Soaring School
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX06CA189
The glider landed hard on the runway and the empennage fractured from the remainder of the structure. On final approach, the glider entered a pilot induced oscillation. The glider then landed hard on the runway. The student pilot said that the glider did not have any mechanical failures or malfunctions during the flight.
NTSB Probable Cause
the student pilot's failure to recover from a porpoise/pilot induced oscillation, which resulted in a hard landing.
Full Narrative
On June 3, 2006, at 1213 Pacific daylight time, a Burkhart Grob Flugzeugbau G103 Twin Astir glider, N4464P, landed hard on the runway at Crystal Airport, Llano, California. Great Western Soaring School, Inc., was operating the glider under the provisions of 14 CFR Part 91. The glider sustained substantial damage. The student pilot, the sole occupant, was not injured. Visual meteorological conditions prevailed, and no flight plan had been filed for the local area instructional flight. The student pilot stated that as he entered onto the final leg of the traffic pattern, the glider began a pilot induced oscillation. When the glider touched down hard upon the runway, the empennage separated. There were no mechanical failures or malfunctions with the glider during the flight.
Flight
Event TypeAccident
Event Time12:13 PDT
Nearest AirportCrystal Airport (0nm)
Runway25
Runway Length2700 ft
Runway Width32 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft
AircraftBurkhart Grob Flugzeugbau G103 TWIN Astir
Tail NumberN4464P
Aircraft CategoryGli
DamageSubstantial
OperatorGreat Western Soaring School
Operating RulePart 91
Engines0
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 61 · None
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility40 sm
CeilingNone
Temperature / Dew Point0 C
Altimeter29.92 inHg
Weather SourcePILO