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
October 30, 1991 · Douglas DC-10-10 · N1808U
Colorado Spring, CO
Overview
Report Status
Probable Cause
Event Type
Incident
Date
October 30, 1991
Injury Outcomes
No injuries (57 uninjured)
Location
Colorado Spring, CO
Aircraft
Douglas DC-10-10
Tail Number
N1808U
Operator
United Airlines
Injuries
None
Aircraft Damage
Minor
NTSB Number
DEN92IA007
AS THE AIRCRAFT APPROACHED 50 KIAS ON THE TAKEOFF ROLL, IT DRIFTED RIGHT. THE FIRST OFFICER, WHO WAS MAKING THE TAKEOFF, CORRECTED WITH LEFT RUDDER. RIGHT DRIFT BECAME MORE PRONOUNCED AND HARD LEFT RUDDER WAS USED. THE CAPTAIN TOOK OVER, RETARDED ALL THREE THROTTLES, THEN ATTEMPTED TO REGAIN CONTROL BY USING ASYMMETRICAL THRUST. WHEN THIS FAILED, THE THROTTLES WERE RETARDED AND REVERSE THRUST APPLIED. POST INCIDENT INSPECTION DISCLOSED NO APPARENT DAMAGE. THE NEXT MORNING, A DIFFERENT CREW REJECTED THE TAKEOFF WHEN THE NO. 3 ENGINE FAILED. POST INCIDENT DISASSEMBLY AND INSPECTION OF THE ENGINE DISCLOSED METAL IN THE TAILPIPE, SAND AND MUD IN THE COMPRESSOR SECTION, AND A 13TH STAGE AND TWO 14TH STAGE COMPRESSOR BLADES BROKEN OFF, CAUSING EXTENSIVE DAMAGE TO BOTH THE LOW AND HIGH PRESSURE TURBINES.
NTSB Probable Cause
THE CAPTAIN'S INADEQUATE SUPERVISION AND THE COPILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL. FACTORS WERE: THE CROSSWIND AND SNOW/ICE ON THE RUNWAY.
Full Narrative
AS THE AIRCRAFT APPROACHED 50 KIAS ON THE TAKEOFF ROLL, IT DRIFTED RIGHT. THE FIRST OFFICER, WHO WAS MAKING THE TAKEOFF, CORRECTED WITH LEFT RUDDER. RIGHT DRIFT BECAME MORE PRONOUNCED AND HARD LEFT RUDDER WAS USED. THE CAPTAIN TOOK OVER, RETARDED ALL THREE THROTTLES, THEN ATTEMPTED TO REGAIN CONTROL BY USING ASYMMETRICAL THRUST. WHEN THIS FAILED, THE THROTTLES WERE RETARDED AND REVERSE THRUST APPLIED. POST INCIDENT INSPECTION DISCLOSED NO APPARENT DAMAGE. THE NEXT MORNING, A DIFFERENT CREW REJECTED THE TAKEOFF WHEN THE NO. 3 ENGINE FAILED. POST INCIDENT DISASSEMBLY AND INSPECTION OF THE ENGINE DISCLOSED METAL IN THE TAILPIPE, SAND AND MUD IN THE COMPRESSOR SECTION, AND A 13TH STAGE AND TWO 14TH STAGE COMPRESSOR BLADES BROKEN OFF, CAUSING EXTENSIVE DAMAGE TO BOTH THE LOW AND HIGH PRESSURE TURBINES.
Flight
Event TypeIncident
Event Time10:03 MST
Nearest AirportColorado Springs Municipa (0nm)
Runway17
Runway Length11021 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftDouglas DC-10-10
Tail NumberN1808U
Aircraft CategoryAir
DamageMinor
OperatorUnited Airlines
Operating RulePart 121
Engines3
Engine TypeTurbofan
Engine DetailsGe · CF6-6 · Turbofan · 39300
Seats292
People & Injuries
Injury SummaryNo injuries (57 uninjured)
Fatal0
Serious0
Minor0
Uninjured57
Total57
Crew 1Age 58 · First Class
Conditions
ConditionsIMC
LightDaylight
Wind100° @ 13 kt
Ceiling400 ft
Temperature / Dew Point12 C / 9 C
Altimeter30.00 inHg
Weather SourceWIT