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
Featured Report

Loading…

Loading featured report…

Loading…
Open 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…

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 manufacturers

Airports

More airports

Operators

More operators

About

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

December 10, 1985 · Piper PA-31-350 · N4NP

Topeka, KS

Overview

Report Status
Preliminary report
Event Type
Accident
Date
December 10, 1985
Injury Outcomes
No injuries (4 uninjured)
Location
Topeka, KS
Aircraft
Piper PA-31-350
Tail Number
N4NP
Operator
Tri Star Transportation
Injuries
None
Aircraft Damage
Substantial
NTSB Number
MKC86LA032

N4NP DIVERTED FROM THE ORIGINAL DESTINATION FORBES FIELD TOPEKA,KANSAS TO BILLARD FIELD,B NM AWAY, DUE TO WEATHER. BILLARD ATCT ADVISED THE FLIGHT DURING INITIAL CONTACT, BEFORE N4NP REACHED THE ILS FOF, OF THE RUNWAY BRAKING ACTION. THE PILOT SAID BRAKING WAS REPORTED AS NIL. THE ATCT ALSO ADVISED THE FLIGHT, ALONG WITH THEIR LANDING CLEARANCE, THAT THE WIND WAS FROM 360 DEGREES AT 17 KNOTS AND TOWER VISIBILITY WAS 5/8 OF A MILE. THE CONTROLLER STATED THAT N4NP LANDED LONG AND RAN OFF THE SIDE OF RUNWAY 13 NEAR THE DEPARTURE END. WHEN THE AIRCRAFT ENTERED SOFT TERRAIN BESIDE THE RIGHT LANDING GEAR COLLAPSED.

Full Narrative

N4NP DIVERTED FROM THE ORIGINAL DESTINATION FORBES FIELD TOPEKA,KANSAS TO BILLARD FIELD,B NM AWAY, DUE TO WEATHER. BILLARD ATCT ADVISED THE FLIGHT DURING INITIAL CONTACT, BEFORE N4NP REACHED THE ILS FOF, OF THE RUNWAY BRAKING ACTION. THE PILOT SAID BRAKING WAS REPORTED AS NIL. THE ATCT ALSO ADVISED THE FLIGHT, ALONG WITH THEIR LANDING CLEARANCE, THAT THE WIND WAS FROM 360 DEGREES AT 17 KNOTS AND TOWER VISIBILITY WAS 5/8 OF A MILE. THE CONTROLLER STATED THAT N4NP LANDED LONG AND RAN OFF THE SIDE OF RUNWAY 13 NEAR THE DEPARTURE END. WHEN THE AIRCRAFT ENTERED SOFT TERRAIN BESIDE THE RIGHT LANDING GEAR COLLAPSED.

Flight

Event TypeAccident
Event Time13:20 CST
Nearest AirportPhillip Billard (0nm N)
Runway13
Runway Length5099 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftPiper PA-31-350
Tail NumberN4NP
Aircraft CategoryAir
DamageSubstantial
OperatorTri Star Transportation
Operating RulePart 135
Engines2
Engine TypeReciprocating
Engine DetailsLycoming · TIO-540J2BD · Reciprocating · 350
Seats4

People & Injuries

Injury SummaryNo injuries (4 uninjured)
Fatal0
Serious0
Minor0
Uninjured4
Total4
Crew 1Age 36 · Second Class

Conditions

ConditionsIMC
LightDaylight
Wind360° @ 11 kt
CeilingOvercast 800 ft
Temperature / Dew Point27 C / 25 C
Altimeter30.00 inHg
Observation Time19:17
Weather SourceWFAC

Appendix: Source Data