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

May 4, 1986 · Schweizer SGS 1-26 · N1140S

Mt. Graylock, MA

Overview

Report Status
Preliminary report
Event Type
Accident
Date
May 4, 1986
Injury Outcomes
1 injury (1 serious injury)
Location
Mt. Graylock, MA
Aircraft
Schweizer SGS 1-26
Tail Number
N1140S
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
NYC86LA118

THE PILOT WAS PRACTICING SIMULATED CROSS COUNTRY PASSES ON A RIDGE AT AN ALTITUDE OF 150 FT AGL ON THE WINDWARD SIDE OF A RIDGE IN A SCHWEIZER SGS 1-26 SAILPLANE. THE PILOT ENCOUNTERED A ROLL CONDITION FROM WHICH HE LOST CONTROL, WAS UNABLE TO RECOVER AND CRASHED INVERTED IN TREES. THE PRIVATE PILOT HELD AND AIRPLANE SINGLE ENGINE LAND RATING AND HAD A LOG BOOK ENDORSEMENT FOR SOLO FLIGHT IN GLIDERS, HOWEVER HE HAD NOT PASSED HIS PRIVATE PILOT GLIDER CHECKRIDE. THE PILOT, RESTRAINED BY A 5 POINT HARNESS RECEIVED SERIOUS INJURIES, WHILE THE AIRCRAFT RECEIVED SUBSTANTIAL DAMAGE.

Full Narrative

THE PILOT WAS PRACTICING SIMULATED CROSS COUNTRY PASSES ON A RIDGE AT AN ALTITUDE OF 150 FT AGL ON THE WINDWARD SIDE OF A RIDGE IN A SCHWEIZER SGS 1-26 SAILPLANE. THE PILOT ENCOUNTERED A ROLL CONDITION FROM WHICH HE LOST CONTROL, WAS UNABLE TO RECOVER AND CRASHED INVERTED IN TREES. THE PRIVATE PILOT HELD AND AIRPLANE SINGLE ENGINE LAND RATING AND HAD A LOG BOOK ENDORSEMENT FOR SOLO FLIGHT IN GLIDERS, HOWEVER HE HAD NOT PASSED HIS PRIVATE PILOT GLIDER CHECKRIDE. THE PILOT, RESTRAINED BY A 5 POINT HARNESS RECEIVED SERIOUS INJURIES, WHILE THE AIRCRAFT RECEIVED SUBSTANTIAL DAMAGE.

Flight

Event TypeAccident
Event Time15:00 EDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftSchweizer SGS 1-26
Tail NumberN1140S
Aircraft CategoryGli
DamageSubstantial
Operating RulePart 91
Engine TypeUnknown
Engine DetailsNone · NONE · Unknown
Seats1

People & Injuries

Injury Summary1 injury (1 serious injury)
Fatal0
Serious1
Minor0
Uninjured0
Total1
Crew 1Age 35 · Second Class

Conditions

ConditionsVMC
LightDaylight
Wind290° @ 15 kt, gusting 20 kt
CeilingNone
Temperature / Dew Point70 F / 0 C
Altimeter0
Weather SourcePILO

Appendix: Source Data