# NTSB WPR21LA128: Aviat A-1C-180, N18AH, McCall, ID, March 11, 2021

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Class 4 · Limited · Final report
- Date: March 11, 2021, 15:30 local (22:30 UTC)
- Place: McCall, ID
- Coordinates: 44.888722, -116.10175 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.8887&lon=-116.1017&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): 102753
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR21LA128
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/102753/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=102753
- Page: https://openairdocs.org/ntsb/WPR21LA128

## Probable cause

The pilot's loss of directional control while landing in a crosswind, which resulted in a ground loop.

## Findings

NTSB's coded findings; those marked are part of the probable cause.

- [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Aviat A-1C-180, 11 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=2210410), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md)
- [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Aviat A-1C-180, 20 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2210410), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md)
- [Wind: crosswind](https://openairdocs.org/ntsb-findings/03034040): Environmental issues › Conditions/weather/phenomena · Effect on equipment; cases with it: [Aviat A-1C-180, 4 cases](https://openairdocs.org/ntsb-findings/03034040/cases.md?model=2210410), [All aircraft, 1,008 cases](https://openairdocs.org/ntsb-findings/03034040/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: [Aviat A-1C-180, 15 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2210410), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md)

## Analysis

The pilot of the tailwheel-equipped airplane reported that, he was landing with a 12-knot crosswind. Upon touchdown, the airplane ground looped, and the right landing gear collapsed. Subsequently, the right wing impacted the ground and sustained substantial damage. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.

## Aircraft

- Registration: [N18AH](https://openairdocs.org/aircraft/N18AH), registered now, S/N 3338, built 2019 (OpenAirDocs)
- Reported make and model: AVIAT AIRCRAFT INC A-1C-180 (NO SERIES)
- Registry model: [Aviat A-1C-180](https://openairdocs.org/model/aviat-a-1c-180) (registry code 2210410) (OpenAirDocs)
- Registry engine: [Lycoming O-360-A1P](https://openairdocs.org/engine/lycoming-o-360-a1p) (registry code 42259, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 3338
- Year built: 2019
- Airframe hours: 52
- Engines: LYCOMING O-360-A1P 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, December 30, 2020, 3 hours before
- Departed: KMYL, McCall, ID
- Destination: Same as departure
- Airport: MYL, Mc Call Muni, runway 34, 6,108 × 75 ft, asphalt
- Equipment: Stall warning system, Satellite tracking device, ADS-B, Electronic flight bag or handheld device, Electronic multifunction display

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 76; injuries: none; flight engineer, commercial, flight instructor; airplane ratings: multi-engine land, single-engine land, multi-engine sea, single-engine sea; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review October 28, 2020; seat: front; restraint: 5-point; flight hours: 8,596 total, 200 in this make and model, 7,833 as pilot in command, 20 in the last 90 days, 5 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 12 knots
- Visibility: 10 statute miles
- Temperature: 44 °F, dew point 21 °F
- Altimeter: 30.04 inHg
- Observed at: KMYL
- METAR: KMYL 112251Z AUTO 29011G16KT 10SM CLR 05/M09 A3004 RMK AO2 SLP207 T00501094

## 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 20210311000969A](https://openairdocs.org/incident/20210311000969A), Mar 11, 2021: Aviat Aircraft Inc A-1C-180, Mccall, ID, Substantial damage. The pilot took off from myl for a local scenic flight at 1500 local time. Upon returning he set up on a 25 mile final for landing runway 34 myl. Winds were 270…

## Docket (2 files)

The files NTSB released with the investigation on September 1, 2021, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=102753. 24.4 MB in all.

- Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 9 pages, 24.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12120847&FileExtension=pdf&FileName=6120%20N18AH_Redacted-Rel.pdf
- Accident photo (item 2, PDF, 1 page, 155 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12120344&FileExtension=pdf&FileName=Accident%20Photo%20LA128-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.

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