# NTSB CEN22LA012: Stinson 108, N677JD, Wildwood, AR, October 8, 2021 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Class 3 · Limited · Final report - Date: October 8, 2021, 13:25 local (18:25 UTC) - Place: Wildwood, AR - Coordinates: 35.017152, -92.070303 - Nearby events: https://openairdocs.org/map.md?lat=35.0172&lon=-92.0703&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Defining event: [Maneuvering: Unknown or undetermined](https://openairdocs.org/ntsb-events/000) - Highest injury: Serious injuries - Injuries: 1 serious - Status: Completed - Report: Approved by Office Director - Investigation class: Class 3 - NTSB office: Central Region - Parties: FAA - NTSB case key (mKey): 104081 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN22LA012 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/104081/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=104081 - Page: https://openairdocs.org/ntsb/CEN22LA012 ## Probable cause A total loss of engine power for reasons that could not be determined. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Stinson 108, 2 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=9230402), [All aircraft, 2,247 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Maneuvering: Unknown or undetermined](https://openairdocs.org/ntsb-events/000) (defining event); cases with it: [Stinson 108, 1 case](https://openairdocs.org/ntsb-events/000/sequence.md?model=9230402), [All aircraft, 1,703 cases](https://openairdocs.org/ntsb-events/000/sequence.md) - [Maneuvering: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341); cases with it: [Stinson 108, 4 cases](https://openairdocs.org/ntsb-events/341/sequence.md?model=9230402), [All aircraft, 3,820 cases](https://openairdocs.org/ntsb-events/341/sequence.md) ## Analysis The pilot reported that after leveling off from a descent and applying power, the engine began to lose power intermittently. Shortly thereafter, the engine lost all power and could not be restored. During a forced landing, the airplane impacted a tree, resulting in substantial damage to the fuselage and left wing. About 10 minutes before the descent, the pilot switched from the right fuel tank to the left fuel tank, which contained about 13 gallons of fuel. Although a postaccident examination revealed a worn piston and cylinder, no mechanical malfunctions or anomalies were discovered that would have precluded normal operation. Fuel was available to the engine as evidenced by the injector pump function, no air obstructions were noted, and both magnetos produced bright blue spark when tested. ## Factual narrative On October 8, 2021, about 1325 central daylight time, a Stinson 108 airplane, N677JD, sustained substantial damage when it was involved in an accident near Wildwood, Arkansas. The pilot sustained serious injuries. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal cross-country flight. The pilot reported that after he leveled from a descent and increased throttle, the engine “began to cough and cut out intermittently.” Shortly thereafter, the engine lost all power, and the propeller began to windmill. He immediately verified the mixture was full rich, applied the carburetor heat, and checked the magnetos, but could not restore engine power. He stated that about 10 minutes before the loss of engine power, he had switched from the right fuel tank to the left fuel tank, which had about 13 gallons of fuel remaining. The pilot executed a forced, power-off landing to a golf course, and the airplane impacted a tree, which resulted in substantial damage to the fuselage and left wing. During a postaccident examination of the Franklin 6A4-150-B3 engine, fuel was ejected from the carburetor when the butterfly valve was manipulated. The top spark plug from the No. 2 cylinder was bright white, consistent with exposure to high heat, and the No. 5 cylinder and piston contained evidence of oil present past the cylinder rings. Both magnetos were removed and tested using a hand drill with all terminals producing bright blue spark. No obstructions were noted within the air induction system and the examination revealed no pre-impact mechanical malfunctions or anomalies that would have precluded normal operation. ## Aircraft - Registration: [N677JD](https://openairdocs.org/deregistered/N677JD-2023-09-16), registration cancelled 2023-09-16, S/N 108-416, built 1946 (OpenAirDocs) - Reported make and model: STINSON 108 - Registry model: [Stinson 108](https://openairdocs.org/model/stinson-108) (registry code 9230402) (OpenAirDocs) - Registry engine: [Franklin 6A4150 series](https://openairdocs.org/engine/franklin-6a4150-series) (registry code 27024, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 108-416 - Year built: 1946 - Airframe hours: 2154.3 - Engines: Franklin 6A4-150-B3 150 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, February 5, 2021, 27.4 hours before - Departed: Arkadelphia, AR - Destination: Searcy, AR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 18; injuries: minor; private; airplane ratings: single-engine land; medical: class 1, without waivers/limitations; last flight review November 12, 2020; seat: left; restraint: lap only; flight hours: 131 total, 95.4 in this make and model, 44.5 as pilot in command, 20.8 in the last 90 days, 8.8 in the last 30 days, 2.4 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 220° at 7 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 88 °F, dew point 59 °F - Altimeter: 30.04 inHg - Observed at: KLRF, 7 nm away - METAR: KLRF 081756Z AUTO 22007KT 10SM CLR 31/15 A3004 RMK AO2 SLP173 T03050149 10305 20150 57015 ## 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 20211008019919A](https://openairdocs.org/incident/20211008019919A), Oct 8, 2021: Stinson 108, Cabot, AR, Substantial damage. On Friday October 8, 2021, N677JD, a stenson 108, was involved in an off-field landing in graystone, AR. The airman was on a cross country flight from… ## Other investigations on N677JD (1) 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. - [NTSB CEN13CA317](https://openairdocs.org/ntsb/CEN13CA317), Jun 4, 2013: Stinson 108 (N677JD), Lebanon, IN, substantial damage. Probable cause: The pilot did not maintain control of the airplane during the landing roll. ## Docket (4 files) The files NTSB released with the investigation on March 22, 2023, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=104081. 7.5 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 11 pages, 5.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13425944&FileExtension=pdf&FileName=6120_REDACTED-Rel.pdf - Examination summary (item 2, PDF, 7 pages, 1.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13427041&FileExtension=pdf&FileName=Examination%20Summary-Rel.pdf - Photos (item 3, PDF, 2 pages, 675 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13427612&FileExtension=pdf&FileName=Photo%20Array-Rel.pdf - Release of aircraft wreckage, NTSB form 6120.15 (item 4, PDF, 1 page, 740 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13427213&FileExtension=pdf&FileName=Signed%20Release_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.