# NTSB DEN06CA075: Aviat A-1, N105KY, Alamosa, CO, May 9, 2006

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Data collection · Final report
- Date: May 9, 2006, 09:45 local (15:45 UTC)
- Place: Alamosa, CO
- Coordinates: 37.434722, -105.851387
- Nearby events: https://openairdocs.org/map.md?lat=37.4347&lon=-105.8514&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report August 29, 2006
- Report: Approved by Office Director
- Parties: FAA Flight Standards District Office
- NTSB case key (mKey): 63657
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN06CA075
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/63657/pdf
- Page: https://openairdocs.org/ntsb/DEN06CA075

## Probable cause

the pilot's failure to maintain aircraft control during the departure, resulting in an inadvertent stall.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of control - in flight, takeoff - initial climb
  - aircraft control - not maintained, pilot in command (cause)
  - stall/mush - inadvertent, pilot in command
- In flight collision with terrain/water, descent - uncontrolled
  - terrain condition - runway

## Analysis

According to several witnesses, the airplane departed the runway, and at approximately 50 feet, appeared to hang in the air. The airplane "fell" out of the sky, impacting the tarmac, adjacent to the departure runway. According to the pilot, he was planning on a soft field takeoff procedure and had selected full flaps. The pilot did not recall anything unusual during the departure roll and did not report any mechanical anomalies. The right wing was bent up at midspan and crumpled. The fuselage, and firewall was wrinkled, the engine was crushed aft and the propeller was broken.

## Factual narrative

According to several witnesses, the airplane took off, and at approximately 50 feet, appeared to "hang in the air." The airplane "fell" out of the sky, impacting the tarmac, adjacent to the departure runway. According to the Pilot/Operator Aircraft Accident Report submitted by the pilot, he was planning on a soft field takeoff procedure and had selected full flaps (30 degrees). The Aviat Aircraft airplane flight manual recommends 30 degrees of flaps for a high performance takeoff. The pilot did not recall anything unusual during the departure roll and did not report any mechanical anomalies. The right wing was bent up at midspan and crumpled. The fuselage, and firewall was wrinkled, the engine was crushed aft and the propeller was broken.

## Aircraft

- Registration: [N105KY](https://openairdocs.org/deregistered/N105KY-2007-07-06), registration cancelled 2007-07-06, S/N 1268, built 1994 (OpenAirDocs)
- Reported make and model: Aviat Inc A-1
- Registry model: [Aviat A-1](https://openairdocs.org/model/aviat-a-1) (registry code 2210302) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1268
- Airframe hours: 486
- Engines: Lycoming O-360-A1P 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: La Soleil LLC
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, August 1, 2005, 39 hours before
- Departed: ALS, Alamosa, CO
- Destination: Q39, CREEDE, CO
- Airport: ALS, San Luis Valley Regional/Bergm, runway 20, 8,519 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 62; injuries: minor; airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, with waivers/limitations; last flight review March 1, 2006; seat: front; flight hours: 20,000 total, 35 in this make and model, 39 in the last 90 days, 12 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: variable at 6 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 54 °F, dew point 30 °F
- Altimeter: 30.02 inHg
- Observed at: ALS, 1 nm away

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 20060509008599A](https://openairdocs.org/incident/20060509008599A), May 9, 2006: Chris A1, Alamosa, CO, Substantial damage. (-23) Pilot stated he thinks the aircraft stalled on takeoff, but does not remember.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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