# NTSB ANC90LA122: Cessna 172F, N7866U, Lake Louise, AK, July 21, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 20, 1990, 22:00 local (Jul 21, 1990, 06:00 UTC)
- Place: Lake Louise, AK
- Location: 62.2814° N, 146.5511° W: Placed by OpenAirDocs: center of Lake Louise, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=62.2814&lon=-146.5511&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report October 7, 1992
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5408
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC90LA122
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5408/pdf
- Page: https://openairdocs.org/ntsb/ANC90LA122

## Probable cause

THE PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL DURING LANDING.  A CONTRIBUTING FACTOR WAS A CROSSWIND.

## 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 - crosswind (contributing factor)
  - directional control - not maintained, pilot in command (cause)
  - terrain condition - loose gravel/sandy (contributing factor)
- On ground/water collision with object, landing - roll

## Analysis

AFTER TOUCHDOWN ON THE GRAVEL ROAD, THE PILOT LOST DIRECTIONAL CONTROL OF THE AIRCRAFT CAUSING THE AIRCRAFT TO STRIKE A ROAD SIGN.

## Aircraft

- Registration: N7866U (not matched to a registry record)
- Reported make and model: CESSNA 172F
- Category: Airplane
- Serial number: 17251866
- Engines: CONTINENTAL O-300 145 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Daniel Perry
- Airworthiness certificate: Standard, Normal
- Departed: ANCHORAGE, AK
- Flight plan: VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; commercial, airline transport, flight instructor; airplane ratings: single-engine sea, multi-engine sea, single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 2,800 total, 600 in this make and model, 2,600 as pilot in command, 15 in the last 90 days, 10 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 190° at 10 knots
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 64 °F, dew point 52 °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 19900720027729A](https://openairdocs.org/incident/19900720027729A), Jul 20, 1990: Cessna 172F, Lake Louise, AK, Substantial damage. Struck a sign landing on a gravel road in a crosswind.

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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