# NTSB CEN19LA233: Cessna 172, N8251L, Kingston, OK, July 22, 2019 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 3 · Limited · Final report - Date: July 22, 2019, 11:50 local (16:50 UTC) - Place: Kingston, OK - Coordinates: 33.999168, -96.641944 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=33.9992&lon=-96.6419&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Defining event: [Takeoff: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342) - Highest injury: No injuries - Injuries: 3 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 3 - NTSB office: Central Region - Parties: FAA FSDO - NTSB case key (mKey): 99911 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN19LA233 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/99911/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=99911 - Page: https://openairdocs.org/ntsb/CEN19LA233 ## Probable cause The partial loss of engine power due to a stuck exhaust valve. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Engine (reciprocating): recip eng cyl section](https://openairdocs.org/ntsb-findings/01058530): Aircraft › Aircraft power plant · Malfunction (probable cause); cases with it: [Cessna 172H, 2 cases](https://openairdocs.org/ntsb-findings/01058530/cases.md?model=2072424), [All aircraft, 373 cases](https://openairdocs.org/ntsb-findings/01058530/cases.md) - [Experience/qualifications: qualification/certification](https://openairdocs.org/ntsb-findings/02031010): Personnel issues › Experience/knowledge · Pilot; cases with it: [Cessna 172H, 2 cases](https://openairdocs.org/ntsb-findings/02031010/cases.md?model=2072424), [All aircraft, 280 cases](https://openairdocs.org/ntsb-findings/02031010/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Takeoff: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342) (defining event); cases with it: [Cessna 172H, 3 cases](https://openairdocs.org/ntsb-events/342/sequence.md?model=2072424), [All aircraft, 1,858 cases](https://openairdocs.org/ntsb-events/342/sequence.md) - [Emergency descent: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Cessna 172H, 20 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=2072424), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The noncertificated pilot and two passengers were departing the airport for a local flight. On departure, the pilot noted that the airplane's engine did not produce full power and that the airplane would not climb as expected. The airplane collided with a sign and a vehicle before coming to rest on a golf course. Examination of the engine found that the No. 1 cylinder exhaust valve was stuck in the open position; no other anomalies were detected with the airframe and engine. It is likely that the reduced engine power was a result of the stuck exhaust valve, which would have severely limited the airplane's climb performance. ## Factual narrative On July 22, 2019, about 1150 central daylight time, a Cessna 172 airplane, N8251L, collided with a vehicle and terrain near Kingston, Oklahoma. The pilot and 2 passengers were not injured, and the airplane was substantially damaged. The airplane was registered to and operated by a private individual under the provisions of Title 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed for the flight, which operated without a flight plan. The flight was originating at the time of the accident. According to information provided by the Federal Aviation Administration, the airplane had just departed the Lake Texoma Airport to the north. The pilot perceived a loss of engine power and the airplane would not climb as expected. The airplane collided with a road sign and then a truck traveling on a highway, before it continued onto a golf course north of the highway. The pilot was flying with an expired student pilot certificate. Examination of the engine found the No. 1 cylinder exhaust valve stuck in the open position. No other anomalies were detected with the airframe and engine. The pilot did not return the NTSB Accident Report Form 6120 and additional information is not available. ## Aircraft - Registration: [N8251L](https://openairdocs.org/deregistered/N8251L-2023-03-04), registration cancelled 2023-03-04, S/N 17256451, built 1967 (OpenAirDocs) - Reported make and model: Cessna 172 (H) - Registry model: [Cessna 172H](https://openairdocs.org/model/cessna-172h) (registry code 2072424) (OpenAirDocs) - Registry engine: [Continental 0-300 series](https://openairdocs.org/engine/continental-0-300-series) (registry code 17022, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 17256451 - Year built: 1967 - Engines: Continental O-300 SER 145 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Departed: F31, Kingston, OK - Airport: F31, Lake Texoma State Park, runway 36, 3,000 × 50 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 66; injuries: none; student; airplane ratings: single-engine land; seat: left ## Weather - Conditions: Visual (VMC), Day - Wind: 300° at 13 knots, gusting 15 - Visibility: 10 statute miles - Temperature: 90 °F, dew point 72 °F - Altimeter: 30.04 inHg - Observed at: KGYI, 17 nm away ## 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 20190722007059A](https://openairdocs.org/incident/20190722007059A), Jul 22, 2019: Cessna 172H, Kingston, OK, Substantial damage. Experienced loss of power on takeoff, aircraft began to descend touched down approximately 100YDS to the north and west of the runway. Aircraft climbed an… ## Docket (2 files) The files NTSB released with the investigation on April 15, 2020, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=99911. 2.2 MB in all. - Engine Examination Report (item 1, .PDF, 2.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40482491&FileExtension=.PDF&FileName=Engine%20Examination%20Report%20-Master.PDF - Case Notes (item 2, .PDF, 52 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40482492&FileExtension=.PDF&FileName=Case%20Notes-Master.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.