# NTSB WPR23LA090: Maule MX-7-160, N30737, Minidoka, ID, January 16, 2023 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: January 16, 2023, 10:30 local (17:30 UTC) - Place: Minidoka, ID - Coordinates: 43.037078, -113.7343 - Nearby events: https://openairdocs.org/map.md?lat=43.0371&lon=-113.7343&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Western Pacific Region - Parties: FAA - NTSB case key (mKey): 106597 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR23LA090 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/106597/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=106597 - Page: https://openairdocs.org/ntsb/WPR23LA090 ## Probable cause The pilot’s failure to maintain control during landing on a contaminated runway. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Object/animal/substance: snow/ice](https://openairdocs.org/ntsb-findings/03022060): Environmental issues › Physical environment · Effect on equipment (probable cause); cases with it: [Maule MX-7-160, 1 case](https://openairdocs.org/ntsb-findings/03022060/cases.md?model=5470203), [All aircraft, 67 cases](https://openairdocs.org/ntsb-findings/03022060/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Maule MX-7-160, 3 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=5470203), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Maule MX-7-160, 2 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=5470203), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Maule MX-7-160, 3 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=5470203), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis The pilot reported that he observed a thin layer of snow that covered his destination runway. He performed a normal approach and landing, but after landing he impacted a snow drift on the runway. The airplane nosed over and came to rest inverted which resulted in substantial damage to the wing and tail structure. The pilot reported no mechanical malfunctions or failures that would have precluded normal operation. ## Aircraft - Registration: [N30737](https://openairdocs.org/deregistered/N30737-2024-04-06), registration cancelled 2024-04-06, S/N 19019C, built 1994 (OpenAirDocs) - Reported make and model: MAULE MX-7-160 - Registry model: [Maule MX-7-160](https://openairdocs.org/model/maule-mx-7-160) (registry code 5470203) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 19019C - Year built: 1994 - Engines: Lycoming O-320 160 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, May 30, 2022 - Departed: TWF, Twin Falls, ID - Destination: U99, Minidoka, ID - Airport: U99, Laidlaw Corrals AIrport, runway 25, 2,250 × 130 ft, grass/turf - Equipment: Electronic flight bag or handheld device, ADS-B, Handheld GPS ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 57; injuries: none; commercial, private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review May 12, 2022; seat: left; restraint: 3-point; flight hours: 832 total, 383 in this make and model, 670 as pilot in command, 19 in the last 90 days, 13 in the last 30 days, 0 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 37 °F, dew point 27 °F - Altimeter: 29.62 inHg - Observed at: KBYI, 30 nm away - METAR: METAR KBYI 161853Z AUTO VRB04KT 10SM CLR 03/M03 A2962 ## 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 20230116000099A](https://openairdocs.org/incident/20230116000099A), Jan 16, 2023: Maule MX-7-160, Kimama, ID, Substantial damage. Before landing the pilot overflew the runway to check the conditions. The pilot has landed on this runway under similair conditions several times. Having… ## Docket (2 files) The files NTSB released with the investigation on June 23, 2023, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=106597. 5.1 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 11 pages, 4.9 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15466208&FileExtension=pdf&FileName=6120%20N30737_Redacted-Rel.pdf - Photos (item 2, PDF, 1 page, 151 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15467730&FileExtension=pdf&FileName=Accident%20Photograph%20N30737-Rel.pdf 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.