# NTSB DEN85LA156: Cessna 170B, N3475D, Englewood, CO, June 15, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 15, 1985, 15:55 local (21:55 UTC)
- Place: Englewood, CO
- Coordinates: 39.579708, -104.859825 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.5797&lon=-104.8598&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16696
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN85LA156
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16696/pdf
- Page: https://openairdocs.org/ntsb/DEN85LA156

## 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 - uncontrolled, pilot in command (cause)
  - lack of recent experience in type operation, pilot in command (contributing factor)
- Nose over, landing - roll
  - terrain condition - soft

## Analysis

ON JUNE 15, 1985, A CESSNA 170B GROUND LOOPED DURING A TOUCH AND GO LANDING AT CONTENNIAL ARPT, ENGLEWOOD, CO. THE PLT SAID A GUST OF WING CAUGHT HIM BY SURPRISE. THE ACFT DEPARTED THE RUNWAY AND FLIPPED OVER ON ITS BACK. THE PLT WAS NOT INJURED.

## Aircraft

- Registration: [N3475D](https://openairdocs.org/deregistered/N3475D-1992-02-20), registration cancelled 1992-02-20, S/N 27018 (OpenAirDocs)
- Reported make and model: CESSNA 170B
- Registry model: [Cessna 170B](https://openairdocs.org/model/cessna-170b) (registry code 2072306) (OpenAirDocs)
- Category: Airplane
- Serial number: 27018
- Airframe hours: 1692
- Engines: LYCOMING O-360 A1D 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Edward Weisner
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, September 1, 1984
- Departed: APA, ENGLEWOOD, CO
- Airport: APA, Contennial, runway 34L, 5,140 × 77 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 49; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 1,470 total, 20 in this make and model, 60 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 340° at 4 knots
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 90 °F

## 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 19850615025449A](https://openairdocs.org/incident/19850615025449A), Jun 15, 1985: Cessna 170B, Englewood, CO, Substantial damage. Ground looped during rollout in light crosswind. Nosed over with damage to wings, stabilizer, fuselage, propeller.

## Other investigations on N3475D (2)

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.

- [NTSB DEN89LA116](https://openairdocs.org/ntsb/DEN89LA116), May 5, 1989: Cessna 170B (N3475D), Deming, NM, substantial damage. Probable cause: THE PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL DURING THE TAKEOFF GROUND RUN, RESULTING IN A LOSS OF CONTROL AND COLLISION WITH THE TERRAIN. THE LACK OF EXPERIENCE IN THIS TYPE OF AIRCRAFT IS…
- [NTSB DEN65D0089](https://openairdocs.org/ntsb/DEN65D0089), May 9, 1965: Cessna 170 (N3475D), Douglas, WY, substantial damage

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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