# NTSB SEA06CA051: Ercoupe 415-C, N93788, Arlington, WA, February 12, 2006 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: February 11, 2006, 16:00 local (Feb 12, 2006, 00:00 UTC) - Place: Arlington, WA - Coordinates: 48.160556, -122.158889 - Nearby events: https://openairdocs.org/map.md?lat=48.1606&lon=-122.1589&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report May 30, 2006 - Report: Approved by Office Director - NTSB case key (mKey): 63197 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA06CA051 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/63197/pdf - Page: https://openairdocs.org/ntsb/SEA06CA051 ## Probable cause The pilot's excessive descent rate and his delay in taking action to reduce the descent rate which resulted in an in-flight collision with the runway during an emergency landing. Contributing factors were the total loss of engine oil pressure and the pilot's failure to check the oil pressure gage after engine start which would have resulted in detection of the oil pressure problem prior to takeoff. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Airframe/component/system failure/malfunction, takeoff - initial climb - engine instrument - not used, pilot in command (contributing factor) - fluid,oil - no pressure (contributing factor) - precautionary landing - initiated, pilot in command - In flight collision with terrain/water, emergency landing after takeoff - descent - excessive, pilot in command (cause) - remedial action - delayed, pilot in command (cause) - terrain condition - runway ## Analysis According to the pilot, earlier in the afternoon, he flew the airplane from one airport to another, and he and his passenger had lunch at the destination airport. The pilot reported that he experienced "some difficulty restarting the plane" for the return trip. After "several tries," he was able to restart the engine. The pilot stated that he did not recall checking the engine oil pressure after restarting the engine. After takeoff on runway 34, the pilot "noticed that the oil pressure indicated 0." He reduced power and maneuvered the airplane for an emergency landing on runway 11. During the turn to final, the airplane "lost altitude," and the pilot attempted to stop the descent by adding power, but the left wing struck the ground. According to the pilot, about 6 months before the accident, "there were several incidents where the oil pressure failed to come up after a stop for lunch. After mechanics replace[d] the oil pressure relief valve, this had not been a problem." The reason for the loss of oil pressure on the accident flight was not determined. ## Factual narrative On February 11, 2006, about 1600 Pacific standard time, an Ercoupe 415-C airplane, N93788, sustained substantial damage when it collided with the ground during an emergency landing after takeoff from the Arlington Municipal Airport, Arlington, Washington. The private pilot and the passenger were not injured. The airplane was registered to and operated by the pilot. Visual meteorological conditions prevailed for the 14 CFR Part 91 personal flight and no flight plan was filed. The flight was originating when the accident occurred and the intended destination was Everett, Washington. According to the pilot, earlier in the afternoon, he flew the airplane from Everett to Arlington, and he and his passenger had lunch at the Arlington Airport. The pilot reported that he experienced "some difficulty restarting the plane" for the return trip to Everett. After "several tries," he was able to restart the engine. The pilot stated that he did not recall checking the engine oil pressure after restarting the engine. After takeoff on runway 34, the pilot "noticed that the oil pressure indicated 0." He reduced power and maneuvered the airplane for an emergency landing on runway 11. During the turn to final, the airplane "lost altitude," and the pilot attempted to stop the descent by adding power, but the left wing struck the ground. The left wing sustained structural damage, the nose landing gear separated, and the propeller was damaged. According to the pilot, about 6 months before the accident, "there were several incidents where the oil pressure failed to come up after a stop for lunch. After mechanics replace[d] the oil pressure relief valve, this had not been a problem." The reason for the loss of oil pressure on the accident flight was not determined. ## Aircraft - Registration: [N93788](https://openairdocs.org/aircraft/N93788), registered now, S/N 1111 (OpenAirDocs) - Reported make and model: Ercoupe 415-C - Registry model: [Ercoupe 415-C](https://openairdocs.org/model/ercoupe-415-c) (registry code 0420322) (OpenAirDocs) - Registry engine: [Continental C85 series](https://openairdocs.org/engine/continental-c85-series) (registry code 17008, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 1111 - Engines: Continental C85 reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Departed: AWO, Arlington, WA - Destination: PAE, Everett, WA - Airport: AWO, Arlington Municipal Airport, runway 11 ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 57; injuries: none; private; airplane ratings: single-engine land; medical: class 3; flight hours: 850 total, 750 in this make and model, 5 in the last 90 days, 1 in the last 30 days ## Weather - Conditions: Visual (VMC), Day ## 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 20060211001679A](https://openairdocs.org/incident/20060211001679A), Feb 11, 2006: Univar 415C, Arlington, WA, Substantial damage. (-23) Aircraft lost oil pressure on departure, returned to the airport and struck wing on landing. 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.