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
April 19, 1984 · Piper PA-28R-200 · N4467X
Concord, MA
Overview
Report Status
Preliminary report
Event Type
Accident
Date
April 19, 1984
Injury Outcomes
1 injury (1 fatality)
Location
Concord, MA
Aircraft
Piper PA-28R-200
Tail Number
N4467X
Operator
Haski Aviation
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
NYC84FA143
THE ACFT CRASHED INTO A HOUSE WHILE ON AN ILS APPROACH TO RWY 11 AT HANSCOM FIELD. SHORTLY BEFORE THE ACFT HAD REACHED THE OUTER MARKER (AND AFTER THE HAND OFF FROM BOSTON APPROACH CONTROL TO HANSCOM TOWER) AN ALTITUDE ALERT ON N4467X WAS RECEIVED BY THE BOSTON APPROACH RADAR CONTROLLER. HE NOTIFIED THE HANSCOM CONTROLLER WHO THEN INFORMED THE PLT OF THE ALERT, TO WHICH THE PLT REPLIED HE WAS AT 1400 FT AND CROSSING THE OUTER MARKER. THIS WAS THE THIRD INSTANCE DURING THE FLT WHERE A DISCREPANCY BETWEEN THE BAROMETRIC ALTIMETER AND THE ENCODING ALTIMETER CAME TO LIGHT. INVESTIGATION ALSO REVEALED THAT THE ACCIDENT OCCURRED AT THE END OF AN 18 HR WORK DAY FOR THE PLT WHO HAD ALSO BEEN ILL WITH THE FLU DURING THE WEEKEND PRECEEDING THE ACCIDENT.
Full Narrative
THE ACFT CRASHED INTO A HOUSE WHILE ON AN ILS APPROACH TO RWY 11 AT HANSCOM FIELD. SHORTLY BEFORE THE ACFT HAD REACHED THE OUTER MARKER (AND AFTER THE HAND OFF FROM BOSTON APPROACH CONTROL TO HANSCOM TOWER) AN ALTITUDE ALERT ON N4467X WAS RECEIVED BY THE BOSTON APPROACH RADAR CONTROLLER. HE NOTIFIED THE HANSCOM CONTROLLER WHO THEN INFORMED THE PLT OF THE ALERT, TO WHICH THE PLT REPLIED HE WAS AT 1400 FT AND CROSSING THE OUTER MARKER. THIS WAS THE THIRD INSTANCE DURING THE FLT WHERE A DISCREPANCY BETWEEN THE BAROMETRIC ALTIMETER AND THE ENCODING ALTIMETER CAME TO LIGHT. INVESTIGATION ALSO REVEALED THAT THE ACCIDENT OCCURRED AT THE END OF AN 18 HR WORK DAY FOR THE PLT WHO HAD ALSO BEEN ILL WITH THE FLU DURING THE WEEKEND PRECEEDING THE ACCIDENT.
Flight
Event TypeAccident
Event Time22:39 EST
Nearest AirportHanscom Field (3nm W)
Runway11
Runway Length7001 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-28R-200
Tail NumberN4467X
Aircraft CategoryAir
DamageDestroyed
OperatorHaski Aviation
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · IO-360-C1C · Reciprocating · 200
Seats4
People & Injuries
Injury Summary1 injury (1 fatality)
Fatal1
Serious0
Minor0
Uninjured0
Total1
Crew 1Age 43 · Third Class
Conditions
ConditionsIMC
LightDark Night
Wind50° @ 7 kt
Visibility1 sm
CeilingOvercast 600 ft
Temperature / Dew Point0 C / 0 C
Altimeter29.00 inHg
Observation Time03:45
Weather SourceWFAC