# NTSB WPR10LA366: Clark RV-9A, N70720, Oregon City, OR, July 23, 2010 - Type: NTSB accident investigation - Classification: Accident · Fatal · Limited investigation · Final report - Date: July 23, 2010, 13:30 local (20:30 UTC) - Place: Oregon City, OR - Coordinates: 45.275276, -122.568611 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=45.2753&lon=-122.5686&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: Fatal - Injuries: 1 fatal - Status: Completed, report September 19, 2011 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 76759 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR10LA366 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/76759/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=76759 - Page: https://openairdocs.org/ntsb/WPR10LA366 ## Probable cause The pilot's decision to depart with known mechanical anomalies and the loss of engine power for undetermined reasons. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Info processing/decision: decision making/judgment](https://openairdocs.org/ntsb-findings/02041520): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Clark Robert L RV-9A, 1 case](https://openairdocs.org/ntsb-findings/02041520/cases.md?model=05615FC), [All aircraft, 3,098 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md) - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Clark Robert L RV-9A, 1 case](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=05615FC), [All aircraft, 2,247 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md) - [Maintenance/inspections: return to service](https://openairdocs.org/ntsb-findings/01010530): Aircraft › Aircraft handling/service · Not inspected (probable cause); cases with it: [Clark Robert L RV-9A, 1 case](https://openairdocs.org/ntsb-findings/01010530/cases.md?model=05615FC), [All aircraft, 14 cases](https://openairdocs.org/ntsb-findings/01010530/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 inspection event](https://openairdocs.org/ntsb-events/050); cases with it: [Clark Robert L RV-9A, 1 case](https://openairdocs.org/ntsb-events/050/sequence.md?model=05615FC), [All aircraft, 229 cases](https://openairdocs.org/ntsb-events/050/sequence.md) - [Enroute-cruise: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) (defining event); cases with it: [Clark Robert L RV-9A, 1 case](https://openairdocs.org/ntsb-events/341/sequence.md?model=05615FC), [All aircraft, 3,820 cases](https://openairdocs.org/ntsb-events/341/sequence.md) - [Enroute-cruise: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Clark Robert L RV-9A, 1 case](https://openairdocs.org/ntsb-events/470/sequence.md?model=05615FC), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The engine had recently been operating erratically and the day before the accident it lost power while the pilot was taxiing. Following numerous failed attempts to restart the engine, it eventually started and began to emit flames from the inlet port and a fire extinguisher was used to suppress the fire. The day of the accident, and after cleaning the residue left from the extinguishing agent, the pilot started the engine, performed a runup and then departed to fly the airplane back to his home airport. A short time after takeoff, the airplane was observed by witnesses to be maneuvering at a low altitude adjacent to a highway as if attempting to land on the road. The engine experienced a loss of engine power and the airplane collided with trees and powerlines during a forced landing; the airplane came to rest inverted and was partially consumed by a post crash fire. A postaccident inspection revealed that the extensive fire damage precluded testing the integrity of the fuel system. Numerous fittings and controls on the engine were loose or very low torque, most likely due to thermal damage from the post crash fire. The examination did not show any evidence of preimpact mechanical malfunction or abnormalities, although the damage was too extensive to definitively determine the reason for the loss of power. ## Factual narrative HISTORY OF FLIGHT On July 23, 2010, about 1330 Pacific daylight time, a Clark Vans RV-9A, N70720, experienced a loss of power and collided with power lines that were adjacent to Highway 213 in Oregon City, Oregon. The pilot/owner was operating the airplane under the provisions of 14 Code of Federal Regulations Part 91. The private pilot, the sole occupant, was killed. The airplane sustained substantial damage. The local personal flight originated from Aurora State Airport, Aurora, Oregon, with a planned destination of Fairways Airport in Oregon City. Visual meteorological conditions prevailed, and a flight plan had not been filed. Numerous witnesses observed the airplane maneuvering at a low altitude adjacent to Highway 213 traveling north. Several of the witnesses thought that the engine did not appear to be producing power. The airplane collided with trees and subsequently flew into powerlines; the airplane came to rest inverted and was partially consumed by fire. During a conversation with a Safety Board investigator, a certified flight instructor (CFI) stated that the pilot had scheduled to take his biennial flight review with him in February 2010, about 2 years since he had given him his last review. At the time the engine was undergoing maintenance and the review had to be postponed. The pilot rescheduled and the CFI flew with him on the day prior to the accident. As part of the review, the pilot flew from Fairways en route to Aurora, where he landed and taxied clear of the runway. As the airplane approached the ramp area, the engine experienced a loss of power and quit. Following numerous failed attempts to restart the engine, the pilot had airport personnel jump start the battery. The engine started and began to emit flames from the inlet port; a fire extinguisher was used to eradicate the fire and the review was canceled. The day of the accident, the pilot and his friend went to Aurora to further investigate the damage incurred the previous day. After cleaning the residue left from the extinguishing agent, the pilot started the engine. The engine appeared to be operating normally and the pilot told his friend that he would do a series of high speed taxis and possibly fly the airplane back to Fairways, where his hangar was located. The pilot performed a run-up inspection and departed, rocking the airplane's wings at 300 feet above ground level (agl), an indication that he would meet his friend back at Fairways. PERSONNEL INFORMATION According to Federal Aviation Administration (FAA) Airman and Medical records files, the pilot held a private pilot certificate with a rating for single-engine land airplane. He additionally held a repairman experimental aircraft builder certificate. The pilot was issued a third-class medical certificate in April 2010 with the limitation that he must wear corrective lenses for near and distant vision. No personal flight records were recovered for the pilot. On the application for his last medical certificatethe pilot stated that his total flight experience was 510 hours. AIRCRAFT INFORMATION The RV-9A single engine kit airplane, serial number 90513, was completed in 2003 by the accident pilot. The FAA records indicated the engine was a four cylinder Aerosport Power IO-320-D1A (serial number L38687-27A) equipped with a Whirlwind 150 propeller (serial number 150-124B). The airplane's logbooks were not located. The FAA records indicated that the pilot had successfully accomplished both Phase One and Phase Two of the experimental operating limitations, with the later completed on April 23, 2003. MEDICAL AND PATHOLOGICAL The Clackamas County Office of the Medical Examiner performed an autopsy on the pilot; the FAA Toxicology Accident Research Laboratory, Oklahoma City, Oklahoma, performed toxicological testing. TESTS AND RESEARCH An FAA certified Airframe and Powerplant mechanic with Inspection Authorization examined the wreckage following recovery. He stated that the fire damage precluded him from testing the integrity of the fuel system. The fuel injection system linkage and hoses were consumed by fire. He noted that numerous fittings and controls on the engine were loose or had very low torque, which he attributed to thermal exposure and damage from the post crash fire. The magneto and electronic system was destroyed. The engine's cylinders did not show any evidence of mechanical malfunction or abnormalities. The spark plugs appeared in new condition. The No. 2 cylinder plugs were oil soaked, which the mechanic thought was consistent with the engine's position on a trailer during the examination. One propeller blade was intact and the other two were destroyed by impact and fire. ## Aircraft - Registration: [N70720](https://openairdocs.org/deregistered/N70720-2013-05-15), registration cancelled 2013-05-15, S/N 90513, built 2003 (OpenAirDocs) - Reported make and model: CLARK RV-9A - Registry model: [Clark Robert L RV-9A](https://openairdocs.org/model/clark-robert-l-rv-9a) (registry code 05615FC) (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: 90513 - Engines: AMA/EXPR IO-320-1DA 100 horsepower reciprocating - Damage: Substantial damage - Fire: On-Ground - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Departed: UAO, Aurora, CA - Destination: OG20, Oregon City, OR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 81; injuries: fatal; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; toxicology performed; flight hours: 510 total ## Weather - Conditions: Visual (VMC), Day - Wind: variable at 3 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 73 °F, dew point 55 °F - Altimeter: 30.06 inHg - Observed at: UAO ## 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 20100723039149A](https://openairdocs.org/incident/20100723039149A), Jul 23, 2010: Clark Rober RV-9A, Oregon City, OR, Destroyed, 1 fatal. On July 23,2010, at approximately 1330 PDT, the aircraft appeared to have experienced a loss of power and collided with trees and a power line adjacent to hwy… ## Docket (3 files) The files NTSB released with the investigation on July 8, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=76759. 201 KB in all. - Mechanic's Statement (item 1, .PDF, 9 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40349833&FileExtension=.PDF&FileName=Mechanic%27s%20Statement-Redacted.PDF - Federal Aviation Administration's Records of Conversations (item 2, .PDF, 81 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40349834&FileExtension=.PDF&FileName=Federal%20Aviation%20Administration%27s%20Records%20of%20Conversations-Redacted.PDF - Toxicological Report (item 3, .PDF, 111 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40349837&FileExtension=.PDF&FileName=Toxicological%20Report-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.