# NTSB WPR25LA308: Thomas Graham Teenie Two, N311TS, Chehalis, WA, September 11, 2025 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Class 4 · Limited · Final report - Date: September 11, 2025, 12:15 local (19:15 UTC) - Place: Chehalis, WA - Coordinates: 46.659, -122.98275 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=46.6590&lon=-122.9827&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Defining event: [Initial climb: Miscellaneous/other](https://openairdocs.org/ntsb-events/900) - Highest injury: Serious injuries - Injuries: 1 serious - Status: Completed, report March 5, 2026 - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 202059 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR25LA308 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/202059/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=202059 - Page: https://openairdocs.org/ntsb/WPR25LA308 ## Probable cause The pilot's improper decision to take off with the airplane over its maximum allowable gross weight, which degraded its climb performance and led to a subsequent off airport landing. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Aircraft capability: maximum weight](https://openairdocs.org/ntsb-findings/01061035): Aircraft › Aircraft oper/perf/capability · Capability exceeded (probable cause); cases with it: [Graham Thomas TEENIE TWO, 1 case](https://openairdocs.org/ntsb-findings/01061035/cases.md?model=05630NW), [All aircraft, 152 cases](https://openairdocs.org/ntsb-findings/01061035/cases.md) - [Planning/preparation: performance calculations](https://openairdocs.org/ntsb-findings/02061010): Personnel issues › Task performance · Pilot; cases with it: [Graham Thomas TEENIE TWO, 1 case](https://openairdocs.org/ntsb-findings/02061010/cases.md?model=05630NW), [All aircraft, 114 cases](https://openairdocs.org/ntsb-findings/02061010/cases.md) - [Use of equip/info: use of equip/system](https://openairdocs.org/ntsb-findings/02063015): Personnel issues › Task performance · Pilot; cases with it: [Graham Thomas TEENIE TWO, 1 case](https://openairdocs.org/ntsb-findings/02063015/cases.md?model=05630NW), [All aircraft, 1,391 cases](https://openairdocs.org/ntsb-findings/02063015/cases.md) - [Performance/control parameters: landing flare](https://openairdocs.org/ntsb-findings/01062041): Aircraft › Aircraft oper/perf/capability · Not attained/maintained; cases with it: [Graham Thomas TEENIE TWO, 1 case](https://openairdocs.org/ntsb-findings/01062041/cases.md?model=05630NW), [All aircraft, 1,285 cases](https://openairdocs.org/ntsb-findings/01062041/cases.md) - [Info processing/decision: decision making/judgment](https://openairdocs.org/ntsb-findings/02041520): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Graham Thomas TEENIE TWO, 1 case](https://openairdocs.org/ntsb-findings/02041520/cases.md?model=05630NW), [All aircraft, 3,098 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md) - [Performance/control parameters: climb rate](https://openairdocs.org/ntsb-findings/01062035): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Graham Thomas TEENIE TWO, 1 case](https://openairdocs.org/ntsb-findings/01062035/cases.md?model=05630NW), [All aircraft, 265 cases](https://openairdocs.org/ntsb-findings/01062035/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Initial climb: Miscellaneous/other](https://openairdocs.org/ntsb-events/900) (defining event); cases with it: [Graham Thomas TEENIE TWO, 1 case](https://openairdocs.org/ntsb-events/900/sequence.md?model=05630NW), [All aircraft, 1,556 cases](https://openairdocs.org/ntsb-events/900/sequence.md) - [Initial climb: Off-field or emergency landing](https://openairdocs.org/ntsb-events/440); cases with it: [Graham Thomas TEENIE TWO, 1 case](https://openairdocs.org/ntsb-events/440/sequence.md?model=05630NW), [All aircraft, 3,365 cases](https://openairdocs.org/ntsb-events/440/sequence.md) ## Analysis The pilot reported that he filled his fuel tanks to full, for the first time since purchasing the airplane, to conduct a flight test to calculate fuel burn rate. A weight and balance calculation provided by the pilot showed that the airplane was over the maximum gross weight by about 25 lbs. During takeoff initial climb, he observed that the airplane was not climbing as he expected and realized he would not be able to clear the trees or powerlines ahead of his position. The pilot initiated a forced landing to a grass covered field, however, during the approach, he observed that the landing distance available was too short and landed with a side slip to arrest the airplane’s forward movement. Subsequently, the airplane landed hard, which resulted in substantial damage to wings and fuselage. The pilot that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N311TS](https://openairdocs.org/deregistered/N311TS-2025-09-19), registration cancelled 2025-09-19, S/N 16-215 (OpenAirDocs) - Reported make and model: Thomas Graham Teenie Two - Registry model: [Graham Thomas TEENIE TWO](https://openairdocs.org/model/graham-thomas-teenie-two) (registry code 05630NW) (OpenAirDocs) - Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 16-215 - Year built: 2013 - Airframe hours: 93.9 - Engines: Volkswagen 1600 Dual Port 60 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Condition, September 1, 2025 - Departed: CLS, Chehalis, WA - Airport: CLS, Chehalis-Centralia, runway 16/34, 5,000 × 140 ft, concrete - Equipment: Electronic flight bag or handheld device ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 55; injuries: serious; sport pilot; airplane ratings: single-engine land; medical: class 1, with waivers/limitations; last flight review September 3, 2025; seat: single; restraint: 5-point; flight hours: 50.8 total, 5.2 in this make and model, 11 as pilot in command, 34 in the last 90 days, 17.8 in the last 30 days, 3.4 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: 1,600 ft overcast - Temperature: 63 °F, dew point 59 °F - Altimeter: 30.05 inHg - Observed at: KCLS, 1 nm away - METAR: METAR KCLS 111915Z AUTO 00000KT 10SM OVC016 17/15 A3005 RMK AO2= ## 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 20250911018069A](https://openairdocs.org/incident/20250911018069A), Sep 11, 2025: Graham Thomas TEENIE TWO, Chehalis, WA, Substantial damage. A conversation with the pilot on 12/8/2025, indicated the aircraft was operating normally. Taxi and runup were normal. The takeoff to the south (R16) was… ## Docket (5 files) The files NTSB released with the investigation on March 5, 2026, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=202059. 17.3 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 12 pages, 10.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19749957&FileExtension=pdf&FileName=6120.1_Redacted-Rel.pdf - Memorandum for record a�� telephone interview, pilot (item 2, PDF, 2 pages, 100 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19777635&FileExtension=pdf&FileName=Record%20of%20phone%20conversation_Redacted-Rel.pdf - Weight and balance calculated by pilot (item 3, PDF, 1 page, 1 photo, 871 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19750796&FileExtension=pdf&FileName=Weight%20and%20Balance%20calculated%20by%20pilot-Rel.pdf - Weight and balance sheet (item 4, PDF, 1 page, 1 photo, 2.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19750762&FileExtension=pdf&FileName=Weight%20and%20Balance_Redacted-Rel.pdf - Investigation photographs (item 5, PDF, 5 pages, 2.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19750602&FileExtension=pdf&FileName=Photo%20array_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.