# NTSB ERA26LA099: Frankewich Walter S-21 Outbound, N88WL, Madisonville, TN, January 19, 2026

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Class 4 · Limited · Final report
- Date: January 19, 2026, 14:43 local (19:43 UTC)
- Place: Madisonville, TN
- Coordinates: 35.544948, -84.380766 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=35.5449&lon=-84.3808&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: 2 uninjured
- Status: Completed, report May 14, 2026
- Report: Approved by Office Director
- Investigation class: Class 4 - Basic report with no Prelim publish
- NTSB office: Eastern Region Aviation
- Parties: FAA/FSDO
- NTSB case key (mKey): 202356
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ERA26LA099
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/202356/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=202356
- Page: https://openairdocs.org/ntsb/ERA26LA099

## Probable cause

The pilot’s failure to compensate for gusty crosswind conditions during the landing roll, which resulted in a loss of control and subsequent runway excursion.

## Findings

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

- [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Frankewich Walter S-21 OUTBOUND, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=05643EW), [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 · Response/compensation (probable cause); cases with it: [Frankewich Walter S-21 OUTBOUND, 1 case](https://openairdocs.org/ntsb-findings/03034040/cases.md?model=05643EW), [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: [Frankewich Walter S-21 OUTBOUND, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=05643EW), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md)
- [Landing-landing roll: Runway excursion](https://openairdocs.org/ntsb-events/300); cases with it: [Frankewich Walter S-21 OUTBOUND, 1 case](https://openairdocs.org/ntsb-events/300/sequence.md?model=05643EW), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md)

## Analysis

The pilot was attempting a normal landing in an 8-knot right crosswind that was gusting to 14 knots. During the landing the airplane departed the left side of the runway and came to rest near a berm. The impact resulted in substantial damage to the fuselage. The pilot reported that there were no preimpact mechanical malfunctions or failures of the airplane that would have precluded normal operation.

## Aircraft

- Registration: [N88WL](https://openairdocs.org/aircraft/N88WL), registered now, S/N 02210165, built 2025 (OpenAirDocs)
- Reported make and model: FRANKEWICH WALTER S-21 OUTBOUND
- Registry model: [Frankewich Walter S-21 OUTBOUND](https://openairdocs.org/model/frankewich-walter-s-21-outbound) (registry code 05643EW) (OpenAirDocs)
- Registry engine: [Continental IOX340 series](https://openairdocs.org/engine/continental-iox340-series) (registry code 17490, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 02210165
- Year built: 2025
- Airframe hours: 17
- Engines: Continental IOX-340-BDEY2 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Flight test, Part 91
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Condition, November 4, 2025, 17 hours before
- Departed: DKX, Knoxville, TN, TN
- Destination: 5TN4, Greenback, TN
- Airport: MNV, Monroe County, runway 23, 3,643 × 75 ft, asphalt
- Equipment: ADS-B, Electronic flight bag or handheld device, Electronic multifunction display, Electronic primary flight display

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 62; injuries: none; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, without waivers/limitations; last flight review April 25, 2024; seat: left; restraint: 3-point; flight hours: 610 total, 21 in this make and model, 545 as pilot in command, 17 in the last 90 days, 5 in the last 30 days, 0 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 320° at 8 knots, gusting 14
- Visibility: 5 statute miles
- Lowest ceiling: none
- Temperature: 39 °F, dew point 10 °F
- Altimeter: 30.22 inHg
- Observed at: MNV
- METAR: METAR KMNV 191935Z AUTO 32008G14KT 5SM HZ CLR 04/M12 A3022 RMK A01=

## 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 20260119000149A](https://openairdocs.org/incident/20260119000149A), Jan 19, 2026: Frankewich Walter S-21 OUTBOUND, Madisonville, TN, Substantial damage. Pilot stated that they got to the plane, conducted preflight, checked weather through foreflight. The sky was clear; it was a beautiful day with nothing…

## Docket (2 files)

The files NTSB released with the investigation on May 14, 2026, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=202356. 6.2 MB in all.

- Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 10 pages, 3.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19922227&FileExtension=pdf&FileName=6120_1_Form_Pilot_Signed_Redacted-Rel.pdf
- Investigative photographs (item 2, PDF, 5 pages, 2.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19940831&FileExtension=pdf&FileName=ERA26LA099_Photo_Array_Redacted-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.