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
July 21, 1991 · Piper PA 18-135 · N9977Q
Gerlach, NV
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 21, 1991
Injury Outcomes
No injuries (2 uninjured)
Location
Gerlach, NV
Aircraft
Piper PA 18-135
Tail Number
N9977Q
Operator
Gregory Powning
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX91LA321
IN BOTH HIS WRITTEN AND VERBAL STATEMENTS THE PILOT SAID THAT HE ENCOUNTERED A 'DOWNDRAFT' WHILE FLYING NEAR GERLACH, NEVADA. THE PILOT STATED THAT THE DOWNDRAFT WAS ENCOUNTERED JUST AS THE AIRCRAFT OVERFLEW A SMALL RIDGE AT LOW ALTITUDE AND HE COULD NOT ARREST THE RATE OF DESCENT PRIOR TO COLLIDING WITH THE GROUND IN THE VALLEY BEYOND. IN HIS WRITTEN REPORT OF THE ACCIDENT, THE PILOT SAID THAT THERE WAS NO MECHANICAL MALFUNCTION OF THE AIRCRAFT. THE CLOSEST WEATHER REPORTING STATION WAS REPORTING WINDS OF LESS THAN FIVE KNOTS. THE PILOT DID NOT INDICATE THAT HIGH WINDS OR OTHER UNUSUAL METEOROLOGICAL CONDITIONS WERE INVOLVED IN THE ACCIDENT CIRCUMSTANCES.
NTSB Probable Cause
THE FAILURE OF THE PILOT TO MAINTAIN ADEQUATE TERRAIN CLEARANCE BY THE SELECTION OF AN INAPPROPRIATE CRUISE ALTITUDE RESULTING IN AN IN FLIGHT COLLISION WITH TERRAIN.
Full Narrative
IN BOTH HIS WRITTEN AND VERBAL STATEMENTS THE PILOT SAID THAT HE ENCOUNTERED A 'DOWNDRAFT' WHILE FLYING NEAR GERLACH, NEVADA. THE PILOT STATED THAT THE DOWNDRAFT WAS ENCOUNTERED JUST AS THE AIRCRAFT OVERFLEW A SMALL RIDGE AT LOW ALTITUDE AND HE COULD NOT ARREST THE RATE OF DESCENT PRIOR TO COLLIDING WITH THE GROUND IN THE VALLEY BEYOND. IN HIS WRITTEN REPORT OF THE ACCIDENT, THE PILOT SAID THAT THERE WAS NO MECHANICAL MALFUNCTION OF THE AIRCRAFT. THE CLOSEST WEATHER REPORTING STATION WAS REPORTING WINDS OF LESS THAN FIVE KNOTS. THE PILOT DID NOT INDICATE THAT HIGH WINDS OR OTHER UNUSUAL METEOROLOGICAL CONDITIONS WERE INVOLVED IN THE ACCIDENT CIRCUMSTANCES.
Flight
Event TypeAccident
Event Time10:00 PDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA 18-135
Tail NumberN9977Q
Aircraft CategoryAir
DamageSubstantial
OperatorGregory Powning
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320 · Reciprocating · 160
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 42 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind180° @ 4 kt
Visibility30 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourcePILO