# NTSB ERA10LA400: Dayton JD-2, N43015, Hollywood, MD, August 5, 2010 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: August 5, 2010, 10:00 local (14:00 UTC) - Place: Hollywood, MD - Coordinates: 38.347221, -76.574996 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=38.3472&lon=-76.5750&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Defining event: [Enroute-cruise: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report July 18, 2011 - Report: Approved by Office Director - NTSB office: Eastern Region Aviation - Parties: FAA/FSDO - NTSB case key (mKey): 76864 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ERA10LA400 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/76864/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=76864 - Page: https://openairdocs.org/ntsb/ERA10LA400 ## Probable cause The pilot's improper installation of the propeller hub to the engine crankshaft, which resulted in a loss of engine thrust. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Propeller system: propeller assembly](https://openairdocs.org/ntsb-findings/01046110): Aircraft › Aircraft propeller/rotor · Incorrect service/maintenance (probable cause); cases with it: [Dayton James Leroy JD-2, 1 case](https://openairdocs.org/ntsb-findings/01046110/cases.md?model=05619CX), [All aircraft, 29 cases](https://openairdocs.org/ntsb-findings/01046110/cases.md) - [Maintenance: installation](https://openairdocs.org/ntsb-findings/02062035): Personnel issues › Task performance · Owner/builder (probable cause); cases with it: [Dayton James Leroy JD-2, 1 case](https://openairdocs.org/ntsb-findings/02062035/cases.md?model=05619CX), [All aircraft, 371 cases](https://openairdocs.org/ntsb-findings/02062035/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Prior to flight: Aircraft maintenance event](https://openairdocs.org/ntsb-events/040); cases with it: [Dayton James Leroy JD-2, 1 case](https://openairdocs.org/ntsb-events/040/sequence.md?model=05619CX), [All aircraft, 484 cases](https://openairdocs.org/ntsb-events/040/sequence.md) - [Enroute-cruise: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) (defining event); cases with it: [Dayton James Leroy JD-2, 1 case](https://openairdocs.org/ntsb-events/341/sequence.md?model=05619CX), [All aircraft, 3,820 cases](https://openairdocs.org/ntsb-events/341/sequence.md) - [Emergency descent: Off-field or emergency landing](https://openairdocs.org/ntsb-events/440); cases with it: [Dayton James Leroy JD-2, 1 case](https://openairdocs.org/ntsb-events/440/sequence.md?model=05619CX), [All aircraft, 3,365 cases](https://openairdocs.org/ntsb-events/440/sequence.md) - [Landing-landing roll: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Dayton James Leroy JD-2, 1 case](https://openairdocs.org/ntsb-events/470/sequence.md?model=05619CX), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The pilot/builder of the experimental airplane was in cruise flight when the engine experienced a sudden increase in rpm with a corresponding loss of thrust. The pilot subsequently performed a forced landing to a highway. During the landing roll, the right wing struck a tree and sustained substantial damage. Examination of the airplane revealed that the propeller assembly rotated without any corresponding engine crankshaft movement. The castellated nut and washer which secured the propeller hub flange to the engine crankshaft were found scored and warped. The propeller assembly had been installed on the non-certificated engine by the pilot approximately 35 hours prior the accident. The pilot did not possess the proper manufacturer technical data and tooling necessary to remove and reinstall the propeller hub assembly on the engine. ## Factual narrative On August 5, 2010, about 1000 eastern daylight time, an experimental, amateur-built Dayton JD-2, N43015, was substantially damaged during a forced landing, after a loss of power near Hollywood, Maryland. The commercial pilot was not injured. Visual meteorological conditions prevailed and no flight plan had been filed for the personal flight conducted under the provisions of 14 Code of Federal Regulations Part 91. The local flight originated from the St. Mary's County Regional Airport (2W6), Leonardtown, Maryland. The pilot/builder reported that he was flying about 800 feet above the ground when he experienced a sudden increase in engine rpm, with a corresponding loss of thrust. He subsequently performed a forced landing to a highway; however, during the landing roll, the right wing struck a tree and sustained substantial damage. Examination of the airplane by a Federal Aviation Administration (FAA) inspector revealed that the propeller assembly rotated without any corresponding engine crankshaft movement. The airplane was issued an experimental airworthiness certificate on March 20, 2005. It was equipped with a non-certificated Rotec R2800 series, 110-horsepower radial engine. According to maintenance records, the airplane was originally equipped with a Continental O-200-A series engine. On December 30, 2009, the pilot installed the Rotec engine and utilized the propeller assembly that was previously installed on the Continental engine. At the time of the accident, the engine had been operated for about 35 hours since it was installed, and approximately 10 hours since its most recent condition inspection, which was performed by the pilot on January 14, 2010. Additional examination of the engine by an FAA inspector revealed that the crankshaft tapered flange was scored, which corresponded with scoring observed inside the tapered propeller hub flange. The castellated nut and washer, which secured the propeller hub flange to the engine crankshaft, were found extremely scored and warped. In addition, the FAA inspector noted that the pilot did not possess the proper manufacturer technical data and tooling to remove and reinstall the propeller hub assembly on the accident engine. ## Aircraft - Registration: [N43015](https://openairdocs.org/aircraft/N43015), registered now, S/N 001, built 2005 (OpenAirDocs) - Reported make and model: DAYTON JD-2 - Registry model: [Dayton James Leroy JD-2](https://openairdocs.org/model/dayton-james-leroy-jd-2) (registry code 05619CX) (OpenAirDocs) - Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 001 - Airframe hours: 350 - Engines: Rotec R2800 110 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Dayton James L - Registered owner: Dayton James L - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Condition, January 14, 2010, 10 hours before - Departed: 2W6, Leonardtown, MD - Destination: 2W6, Leonardtown, MD - Airport: 2W6, St. Mary's County Regional ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 76; injuries: none; commercial; airplane ratings: single-engine land; medical: class 2, with waivers/limitations; last flight review March 2, 2009; seat: front; flight hours: 1,600 total, 300 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 230° at 8 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 81 °F, dew point 70 °F - Altimeter: 29.80 inHg - Observed at: 2W6, 3 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 20100805043239A](https://openairdocs.org/incident/20100805043239A), Aug 5, 2010: Dayton Jame JD-2, Hollywood, MD, Substantial damage. 8/5/10 Two inspectors from the Washington, d.c. FSDO were assigned to an experimental aircraft accident in st. mary's county, MD. The inspectors arrived on… ## Docket (4 files) The files NTSB released with the investigation on April 27, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=76864. 986 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 820 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40341205&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - FAA Interview Memorandum (item 2, .PDF, 41 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40341207&FileExtension=.PDF&FileName=FAA%20Interview%20Memorandum-Master.PDF - Airworthiness Cerificate (item 3, .PDF, 54 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40341208&FileExtension=.PDF&FileName=Airworthiness%20Cerificate-Redacted.PDF - Maintenance Records (excerpts) (item 4, .PDF, 72 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40341215&FileExtension=.PDF&FileName=Maintenance%20Records%20(excerpts)-Redacted.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.