# NTSB ANC91LA064: Cessna 170B, N1658D, Anchorage, AK, June 3, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 2, 1991, 20:15 local (Jun 3, 1991, 04:15 UTC)
- Place: Anchorage, AK
- Coordinates: 61.159309, -149.989791 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.1593&lon=-149.9898&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report January 22, 1993
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5549
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC91LA064
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5549/pdf
- Page: https://openairdocs.org/ntsb/ANC91LA064

## Probable cause

THE PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL DURING THE LANDING ROLL. THE UNFAVORABLE WIND WAS A RELATED FACTOR.

## 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
  - weather condition - unfavorable wind (contributing factor)
  - directional control - not maintained, pilot in command (cause)
- Dragged wing,rotor,pod,float or tail/skid, landing - roll

## Analysis

THE PILOT LOST DIRECTIONAL CONTROL OF THE AIRPLANE AND GROUND LOOPED IMMEDIATELY UPON TOUCHDOWN ON THE RUNWAY DURING VARIABLE CROSSWIND CONDITIONS.  THE PILOT HAD REQUESTED A LANDING ON ANOTHER RUNWAY ON WHICH HE WOULD HAVE LANDED WITH A HEADWIND.  THE REQUEST WAS DENIED BY THE CONTROL TOWER OPERATOR DUE TO CONFLICTING TRAFFIC.

## Aircraft

- Registration: [N1658D](https://openairdocs.org/aircraft/N1658D), registered now, S/N 20300, built 1952 (OpenAirDocs)
- Reported make and model: CESSNA 170B
- Registry model: [Cessna 170B](https://openairdocs.org/model/cessna-170b) (registry code 2072306) (OpenAirDocs)
- Registry engine: [Continental C145 series](https://openairdocs.org/engine/continental-c145-series) (registry code 17012, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 20300
- Airframe hours: 2149
- Engines: CONTINENTAL C-145 145 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Lucius R. Clement
- Registered owner: Lucius R. Clement
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, September 9, 1990, 11 hours before
- Departed: TKA, TALKEETNA, AK
- Flight plan: VFR
- Airport: ANC, Anchorage International, runway 14, 10,496 × 150 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 45; airline transport; airplane ratings: single-engine sea, multi-engine land, single-engine land, multi-engine sea; instrument ratings: airplane, helicopter; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 18,250 total, 1,225 in this make and model, 150 in the last 90 days, 50 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 10 knots
- Visibility: 35 statute miles
- Lowest ceiling: 7,000 ft overcast
- Temperature: 46 °F, dew point 39 °F
- Altimeter: 30.00 inHg
- Observed at: ANC, 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 19910602021449A](https://openairdocs.org/incident/19910602021449A), Jun 2, 1991: Cessna 170B, Anchorage, AK, Substantial damage. Variable surface wind from 180 to 240 degrees. Requested 24. ATC gave 14 or 6 only. Lost control and ground looped

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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