# NTSB ANC86LA041: Piper PA-18, N7145K, Fairbanks, AK, March 24, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 24, 1986, 17:00 local (21:00 UTC)
- Place: Fairbanks, AK
- Coordinates: 64.810493, -147.720794 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=64.8105&lon=-147.7208&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 office: Alaska Regional Office
- NTSB case key (mKey): 4647
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC86LA041
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4647/pdf
- Page: https://openairdocs.org/ntsb/ANC86LA041

## 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
  - terrain condition - snowbank (cause)
  - aircraft handling - not maintained, pilot in command(cfi) (cause)
  - complacency, pilot in command(cfi) (contributing factor)
  - ground loop/swerve - inadvertent, pilot in command(cfi) (cause)
  - directional control - not maintained, pilot in command(cfi) (cause)
- On ground/water collision with object, landing - roll
- Nose over, landing - roll

## Analysis

THE FLIGHT INSTRUCTOR STATED THAT HE WAS DEMONSTRATING A STALL LANDING TO THE STUDENT PILOT. AFTER TOUCHDOWN AND ROLLOUT THE AIRCRAFT STRUCK A SNOW DRIFT ON THE RUNWAY CAUSING THE AIRCRAFT TO NOSE OVER ON ITS BACK.

## Aircraft

- Registration: [N7145K](https://openairdocs.org/aircraft/N7145K), registered now, S/N 18-365, built 1950 (OpenAirDocs)
- Reported make and model: PIPER PA-18
- Registry model: [Piper PA-18](https://openairdocs.org/model/piper-pa-18) (registry code 7101802) (OpenAirDocs)
- Registry engine: [Lycoming 0-290 series](https://openairdocs.org/engine/lycoming-0-290-series) (registry code 41506, 4 cycle) (OpenAirDocs)
- Category: Airplane
- Serial number: 18365
- Airframe hours: 3746
- Engines: LYCOMING O-320-A2B 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: Joe B. Hoy
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, October 14, 1985, 6 hours before
- Airport: MTF, Metro, runway 6, 4,400 ×  ft, gravel

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 60; flight instructor, airline transport; airplane ratings: single-engine land, multi-engine land, single-engine sea; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: rear; flight hours: 11,097 total, 4,000 in this make and model, 11,087 as pilot in command, 18 in the last 90 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 60 statute miles
- Lowest ceiling: none
- Temperature: 30 °F, dew point 7 °F
- Altimeter: 29.00 inHg

## 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 19860324007689A](https://openairdocs.org/incident/19860324007689A), Mar 24, 1986: Piper PA18, Fairbanks, AK, Substantial damage. During rollout, after stall landing, the left wheel struck a snowdrift. Aircraft nosed over.

## Other investigations on N7145K (3)

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 ANC81FAA38](https://openairdocs.org/ntsb/ANC81FAA38), Sep 26, 1981: Piper PA-18 (N7145K), Fairbanks, AK, substantial damage
- [NTSB ANC74FAA01](https://openairdocs.org/ntsb/ANC74FAA01), Jul 7, 1973: Piper PA-18 (N7145K), Fairbanks, AK, substantial damage
- [NTSB ANC72DAA33](https://openairdocs.org/ntsb/ANC72DAA33), Jun 10, 1972: Piper PA-18 (N7145K), Big Delta, AK, 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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