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 6, 2009 · Cessna 404 · N37127
Englewood, CO
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
June 6, 2009
Injury Outcomes
No injuries (1 uninjured)
Location
Englewood, CO
Aircraft
Cessna 404
Tail Number
N37127
Operator
Key Lime Air
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CEN09CA343
While en route, the left and right hydraulic system failure lights illuminated. The pilot diverted to an alternate airport. The pilot was unable to extend the landing gear using the normal system. The pilot tried the emergency system but the gear still would not extend. The pilot was forced to land wheels up after diverting to an alternate airport. The airplane's keel sustained substantial damaged during the landing. An examination of the airplane showed a hydraulic line had failed downstream of the left and right hydraulic pumps and the emergency landing gear extension air bottle, making gear extension impossible.
NTSB Probable Cause
Aircraft-Aircraft systems-Hydraulic power system-Hydraulic, main system-Failure - C
Full Narrative
While en route, the airplane's left and right hydraulic system failure lights illuminated. The pilot diverted to an alternate airport. The pilot was unable to extend the landing gear using the normal system. The pilot tried the emergency system but the gear still would not extend. The pilot was forced to land with the airplane's wheels up after diverting to an alternate airport. The airplane's keel sustained substantial damage during the landing. An examination of the airplane showed that a hydraulic line had failed downstream of the left and right hydraulic pumps and the emergency landing gear extension air bottle, making gear extension impossible.
Flight
Event TypeAccident
Event Time20:50 MDT
Nearest AirportCentennial (0nm)
Runway35L
Runway Length7004 ft
Runway Width77 ft
Flight Plan FiledIFR
Flight Plan ActivatedYes
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 404
Tail NumberN37127
Aircraft CategoryAir
DamageSubstantial
OperatorKey Lime Air
Operating RulePart 135
Engines2
Engine TypeReciprocating
Engine DetailsTeledyne · GTSIO-520-M · Reciprocating · 375 | Teledyne · GTSIO-520-M · Reciprocating
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 47 · Second Class · None
Conditions
ConditionsVMC
LightDusk
Wind340° @ 7 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point64 F / 55
Altimeter29.82 inHg
Observation Time02:53
Weather SourceWFAC