NTSB CAROL · Event
Event DEN06LA099
Registry · N85086
FAA Aircraft Registry record.
Make / Model
AERONCA 7AC
Engine
CONT MOTOR A&C65 SERIES (65 hp)
Seats / Engines
2 seats · 1 engine
Last airworthiness date
19551208
ADS-B equipped
Yes — Mode-S ABAAE7
Registrant of record
BLACKSTONE AIRCRAFT LLC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
the flight instructor's failure to maintain airspeed while maneuvering resulting in an inadvertent stall and subsequent impact with terrain. Contributing factors were the high density altitude, rising terrain, and improper in-flight planning.
Factual narrative
On July 15, 2006, approximately 0750 mountain daylight time, an Aeronca 7AC single-engine airplane, N85086, was destroyed when it impacted terrain following a loss of control during initial takeoff climb from Everitt Airport (1CO8), Parker, Colorado. The flight instructor and student sustained serious injuries. The airplane was registered to and operated by a private individual. Visual meteorological conditions prevailed, and a flight plan was not filed for the Title 14 Code of Federal Regulations Part 91 instructional flight. The local flight was originating at the time of the accident. According to the flight instructor and student, they discussed the direction of take-off before the flight and elected to take-off on runway 22, since the tailwind component was too strong for runway 4. They also discussed "a go/no go location on the strip [where] we would abort if not off the ground by that point." The instructor reported "the run-up was normal and everything seemed in order." The take-off was normal and the airplane was airborne before the decision point. They stated the airplane was "climbing out upslope, everything seemed normal as the student flew, until he said he might need some help." The instructor reported the airplane had stopped climbing and "the ridge was getting closer." Subsequently, they attempted a shallow bank at a direction 90 degrees from their original course. At that point, " the left wing dipped and we lost control." The instructor reported "we were slow and not very high, so there was not much momentum built up before we struck first the left wing tip, followed by the right wing and airplane." He also reported the engine had been operating normally throughout the flight, and there were no anomalies noted with the handling of the airplane. At 0753, the Centennial Airport (APA), Denver, Colorado, automated surface observing system (ASOS), located approximately 15 miles northwest of the accident site, reported the wind from 220 degrees at 11 knots, few clouds at 12,000 feet, temperature 26 degrees Celsius, dew point 6 degrees Celsius, and an altimeter setting of 30.30 degrees. The calculated density altitude at APA was 8,675 feet. Examination of the airplane, conducted by a Federal Aviation Administration inspector, revealed the forward fuselage was crushed up and aft. The leading edges of both wings were crushed aft. The engine was partially separated from the airframe, and both propeller blades were bent aft. Flight control continuity was established to all flight control surfaces. Prior to takeoff, the flight instructor and student discussed the direction of takeoff before the flight, and they elected to takeoff on runway 22, since the tailwind component was too strong for runway 4. They also discussed "a go/no go location on the strip where [they] would abort if not off the ground by that point." The instructor reported "the run-up was normal and everything seemed in order." The takeoff was normal and the airplane was airborne before the decision point. The airplane was "climbing out upslope, everything seemed normal as the student flew, until he said he might need some help." The instructor reported the airplane had stopped climbing and "the ridge was getting closer." Subsequently, they attempted a shallow bank at a direction 90 degrees from their original course. At that point, " the left wing dipped and we lost control." The instructor reported "we were slow and not very high, so there was not much momentum built up before we struck first the left wing tip, followed by the right wing and airplane." He also reported the engine had been operating normally throughout the flight, and there were no anomalies noted with the handling of the airplane. The calculated density altitude near the airport at the time of the accident was 8,675 feet. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_2006_DEN06LA099.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
Beyond the agency record
Search this event elsewhere.
Pre-filled searches into the sources where news + community discussion of aviation events lives. External sources are reported, not agency. Treat them as signal that something happened, not as fact about what happened.
Entity-clustered aviation events in the press — last 24 hr + 30-day archive.
Official agency record + docket.
Investigative docket: factual reports, photos, transcripts.
Long-running aviation incident database (Flight Safety Foundation).
Community NTSB synthesis blog — often has photos and witness reports.
Gold-standard aviation incident blog.
Aviation industry news search.
GA pilot forum — informed but rumor-prone.
GA pilot subreddit search.
Tail-number page — flight history (free tier limited).
AOPA Air Safety Institute search.
Mainstream press coverage. Recent events only.
Privacy-preserving news search.
External links open in a new tab. We don't ingest their content; we deep-link search queries.
Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (stall, loss of control). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- Semantic Scholar 2016 · Article (Interacción)
Trajectory Recovery System: Angle of Attack Guidance for Inflight Loss of Control
This paper describes the design and development of an ecological display to aid pilots in the recovery of an In-Flight Loss of Control event due to a Stall (ILOC-S).
- NTSB Aircraft Accident Reports 2010 · Accident report
Loss of Control on Approach — Colgan Air Flight 3407
Colgan Air 3407 / Continental Connection (Q400) Buffalo NY, February 12, 2009 — 50 fatalities. Definitive investigation of the Colgan 3407 stall-stick-pusher crash on approach to Buffalo.
- NASA NTRS 2026 · Conference Paper
Computational Analysis of Steady State Aerodynamics of Transonic Truss-Braced Wing Configuration in Deep Stall
This study presents a computational investigation of steady state aerodynamics of the Subsonic Ultra-Green Aircraft Research (SUGAR) Transonic Truss-Braced Wing (TTBW) configuration over a wide range …
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER)
A Scoping Review of Aviation Loss of Control Inflight Research
Loss of control – inflight (LOC-I) contributes to aircraft accidents at unacceptably high rates. Significant industry efforts and research have aimed to improve LOC-I prevention, detection, and recove…
- arXiv 2025 · arXiv preprint
Quadratic Programming Approach to Flight Envelope Protection Using Control Barrier Functions
Ensuring the safe operation of aerospace systems within their prescribed flight envelope is a fundamental requirement for modern flight control systems.
- SKYbrary (Eurocontrol) 2024 · SKYbrary article
Loss of Control In-Flight (LOC-I) — SKYbrary Knowledge Base
SKYbrary comprehensive knowledge-base entry on Loss of Control In-Flight — definitions, contributing factors, accident case studies (Air France 447, Colgan 3407), and prevention strategies.
Browse the full corpus — academia portal ↗