# NTSB ANC93LA092: Piper PA-18-150, N2571H, Skwentna, AK, June 15, 1993 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: June 15, 1993, 13:00 local (21:00 UTC) - Place: Skwentna, AK - Coordinates: 61.930343, -151.729736 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=61.9303&lon=-151.7297&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report June 30, 1994 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - NTSB case key (mKey): 2360 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC93LA092 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/2360/pdf - Page: https://openairdocs.org/ntsb/ANC93LA092 ## Probable cause THE PILOT IN COMMAND SELECTED UNSUITABLE TERRAIN ON WHICH TO LAND ON. A FACTOR IN THE ACCIDENT WAS THE ROUGH/UNEVEN, SOFT TERRAIN. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Nose over, landing - roll - terrain condition - rough/uneven (contributing factor) - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause) - terrain condition - soft (contributing factor) ## Analysis THE AIRPLANE WAS OWNED AND OPERATED BY A HUNTING LODGE. THE PILOT IN COMMAND REPORTED THAT HE LANDED AT THE REMOTE SOD STRIP IN ORDER TO MAKE IMPROVEMENTS TO A MOOSE HUNTING CAMP LOCATED NEARBY. THIS WAS THE PILOT'S FIRST FLIGHT INTO THE STRIP THIS SEASON. DURING THE LANDING ROLLOUT, THE PLANE TRAVERSED A SOFT HUMUS AREA AND NOSED OVER ONTO ITS BACK. ## Factual narrative On June 15, 1993, at 1330 Alaska daylight time, a wheel equipped Piper PA 18 150 airplane, N2571H, owned and operated by Wolf Trail Lodge, Inc., crashed during the landing rollout on a remote sod surfaced landing strip situated near a moose hunting camp. The commercial certificated pilot in command, the sole occupant, was not injured and the airplane sustained substantial damage. The business flight was being conducted under 14 CFR Part 91 at the time of the mishap for the purpose of making improvements to the camp. Visual meteorological conditions prevailed and a VFR flight plan had not been filed. The pilot in command reported to the NTSB investigator in charge by telephone on June 18, 1993, that this was his first seasonal landing at the strip, which he estimated to be approximately 750 feet in length. He elected to land on the first portion of the strip and reported that it was, "too rough". During the rollout, the plane traversed a soft area of humus and nosed over onto its back. ## Aircraft - Registration: [N2571H](https://openairdocs.org/aircraft/N2571H), registered now, S/N 18-7909200, built 1979 (OpenAirDocs) - Reported make and model: PIPER PA-18-150 - Registry model: [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150) (registry code 7101828) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 18-009200 - Airframe hours: 1370 - Engines: LYCOMING O-320 150 horsepower reciprocating - Damage: Substantial damage - Flight: Business, Part 91 - Operator: Wolf Trail Lodge, Inc. - Registered owner: Wolf Trail Lodge, Inc. - Airworthiness certificate: Standard, Normal - Last inspection: Annual, March 9, 1993, 1,320 hours before - Departed: Z41, ANCHORAGE, AK - Airport: Sod Moose Hunting Strip ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 39; commercial; airplane ratings: single-engine sea, single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 2,600 total, 925 in this make and model, 2,600 as pilot in command, 90 in the last 90 days, 35 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 270° at 5 knots - Visibility: 50 statute miles - Lowest ceiling: none - Temperature: 64 °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 19930615047069A](https://openairdocs.org/incident/19930615047069A), Jun 15, 1993: Piper PA18150, Skwentna, AK, Substantial damage. Landed on rough lodge strip. Hit soft area and nosed over. First seasonal landing at 750 foot strip. ## Other investigations on N2571H (1) 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 ANC87LA105](https://openairdocs.org/ntsb/ANC87LA105), Jul 24, 1987: Piper PA-18 (N2571H), Talkeetna, 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. --- 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.