# NTSB ANC91LA116: Piper PA-22, N6058D, Gulkana, AK, August 7, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 6, 1991, 16:30 local (Aug 7, 1991, 00:30 UTC)
- Place: Gulkana, AK
- Coordinates: 55.92086, -159.490798 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=55.9209&lon=-159.4908&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 27, 1993
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5593
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC91LA116
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5593/pdf
- Page: https://openairdocs.org/ntsb/ANC91LA116

## Probable cause

THE PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL OF THE AIRPLANE DURING THE LANDING ROLL.  CONTRIBUTING TO THE ACCIDENT WAS THE UNSUITABLE TERRAIN SELECTED BY THE PILOT FOR LANDING WHICH WAS ROUGH, UNEVEN AND SOFT.

## 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 - rough/uneven
  - directional control - not maintained, pilot in command (cause)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (contributing factor)
- On ground/water encounter with terrain/water, landing - roll

## Analysis

THE PILOT STATED THAT AFTER TOUCHDOWN ON THE GRAVEL STRIP, THE AIRPLANE STRUCK A ROCK.  THE AIRPLANE THEN VEERED TO THE RIGHT AND EXITED THE LANDING AREA.

## Aircraft

- Registration: [N6058D](https://openairdocs.org/aircraft/N6058D), registered now, S/N 22-4711, built 1956 (OpenAirDocs)
- Reported make and model: PIPER PA-22
- Registry model: [Piper PA-22-150](https://openairdocs.org/model/piper-pa-22-150) (registry code 7102210) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 224711
- Airframe hours: 2995
- Engines: LYCOMING O-320 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Michael Mark-Anthony
- Registered owner: Michael Mark-Anthony
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, July 6, 1990, 80 hours before
- Departed: PAQ, PALMER, AK
- Airport: Gold Creek

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 70 total, 12 in this make and model, 45 as pilot in command, 22 in the last 90 days, 6 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 90° at 15 knots
- Visibility: 3 statute miles
- Lowest ceiling: 1,000 ft overcast
- Temperature: 61 °F, dew point 55 °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 19910806050529A](https://openairdocs.org/incident/19910806050529A), Aug 6, 1991: Piper STCPA22, Gulkana, AK, Substantial damage. Tail spring broke after striking a rock while landing on gravel bar airstrip. Lost control and veered off strip.

## Other investigations on N6058D (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 WPR23LA180](https://openairdocs.org/ntsb/WPR23LA180), May 8, 2023: Piper PA-22-150 (N6058D), Ariel, WA, substantial damage. Probable cause: The pilot’s failure to maintain aircraft control during the landing roll, resulting in a nose over.
- [NTSB ANC96LA028](https://openairdocs.org/ntsb/ANC96LA028), Mar 2, 1996: Piper PA-22 (N6058D), Cooper Landing, AK, substantial damage. Probable cause: the pilot's selection of unsuitable terrain for landing. Soft snow conditions were a factor in the accident.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.