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
November 27, 1984 · Cessna 421B · N41097
Mason City, IA
Overview
Report Status
Preliminary report
Event Type
Accident
Date
November 27, 1984
Injury Outcomes
No injuries (5 uninjured)
Location
Mason City, IA
Aircraft
Cessna 421B
Tail Number
N41097
Operator
Skytrak Aviation
Injuries
None
Aircraft Damage
Substantial
NTSB Number
MKC85LA028
THE ATP PIC KNEW THAT HE WOULD BE FLYING INTO AREA OF SURFACE ICING. BOOTS ON HORIZONTAL STABILIZER DID NOT REMOVE ICE. OVER RWY AT 30 FT, ACFT STALLED & HIT THE RWY HARD. MANUFACTORER STATES ACFT CANNOT BE CERTIFIED FOR FLT INTO KNOWN ICING. DEICE AND ANTI-ICE EQUIPMENT WAS INSTALLED AT THE FACTORY DURING MANUFACTURE.
Full Narrative
THE ATP PIC KNEW THAT HE WOULD BE FLYING INTO AREA OF SURFACE ICING. BOOTS ON HORIZONTAL STABILIZER DID NOT REMOVE ICE. OVER RWY AT 30 FT, ACFT STALLED & HIT THE RWY HARD. MANUFACTORER STATES ACFT CANNOT BE CERTIFIED FOR FLT INTO KNOWN ICING. DEICE AND ANTI-ICE EQUIPMENT WAS INSTALLED AT THE FACTORY DURING MANUFACTURE.
Flight
Event TypeAccident
Event Time14:05 CST
Nearest AirportMinicipal (0nm N)
Runway35
Runway Length6504 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 421B
Tail NumberN41097
Aircraft CategoryAir
DamageSubstantial
OperatorSkytrak Aviation
Operating RulePart 135
Engines2
Engine TypeReciprocating
Engine DetailsContinental · GTSIO-520-H · Reciprocating · 375
Seats8
People & Injuries
Injury SummaryNo injuries (5 uninjured)
Fatal0
Serious0
Minor0
Uninjured5
Total5
Crew 1Age 49 · First Class
Conditions
ConditionsIMC
LightDaylight
Wind280° @ 13 kt
Ceiling600 ft
Temperature / Dew Point30 C / 30 C
Altimeter29.00 inHg
Observation Time20:14
Weather SourceWFAC