# NTSB DEN07CA080: Aviat A-1B, N777HY, Englwood, CO, January 28, 2007

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Data collection · Final report
- Date: January 28, 2007, 14:00 local (21:00 UTC)
- Place: Englwood, CO
- Coordinates: 39.572223, -104.849998
- Nearby events: https://openairdocs.org/map.md?lat=39.5722&lon=-104.8500&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report June 27, 2007
- Report: Approved by Office Director
- Parties: FAA Flight Standards District Office
- NTSB case key (mKey): 65510
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN07CA080
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/65510/pdf
- Page: https://openairdocs.org/ntsb/DEN07CA080

## Probable cause

The pilot's failure to maintain directional control during landing resulting in a ground loop.

## Analysis

During the landing roll the pilot noticed the airplane was too far to the left of center line.  He applied full right rudder and the airplane ground looped, impacting a snow bank, and causing substantial damage.  An examination of the airplane systems revealed no anomalies.

## Factual narrative

According to the pilot, he landed the airplane on runway 17R (7,004 feet by 77 feet, asphalt) and noticed it was too far to the left of center line.  He applied full right rudder and the airplane ground looped, impacting a snow bank.  The right aileron and elevator were bent and broken.  An examination of the airplane systems revealed no anomalies.

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - directional control - not maintained, pilot in command (cause)
  - ground loop/swerve - encountered (cause)
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - snowbank

## Aircraft

- Registration: [N777HY](https://openairdocs.org/aircraft/N777HY), registered now, S/N 2387, built 2007 (OpenAirDocs)
- Reported make and model: Aviat A-1B
- Registry model: [Aviat A-1B](https://openairdocs.org/model/aviat-a-1b) (registry code 2210406) (OpenAirDocs)
- Registry engine: [Lycoming O-360-A1P](https://openairdocs.org/engine/lycoming-o-360-a1p) (registry code 42259, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 2387
- Airframe hours: 15
- Engines: Lycoming O-360-A1P 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Airworthiness certificate: Standard, Normal
- Departed: APA, DENVER, CO
- Destination: APA, DENVER, CO
- Airport: APA, Centennial, runway 17R, 7,004 × 77 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; injuries: none; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, without waivers/limitations; last flight review September 1, 2006; seat: left; flight hours: 850 total, 6 in this make and model, 825 as pilot in command, 60 in the last 90 days, 24 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 110° at 5 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 41 °F, dew point 12 °F
- Altimeter: 30.00 inHg
- Observed at: KAPA, 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 20070128000769A](https://openairdocs.org/incident/20070128000769A), Jan 28, 2007: Aviat A1B, Denver, CO, Minor damage. (-23) Upon landing runway 17R at apa the aircraft drifted to the left and slid into a snow bank. Minor damage to right wing tip fabric cover. (-23 amendment)…

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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