# NTSB LAX04LA265: Ercoupe 415-D, N3837H, Santa Clarita, CA, July 13, 2004 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: July 12, 2004, 17:30 local (Jul 13, 2004, 00:30 UTC) - Place: Santa Clarita, CA - Coordinates: 34.418334, -118.514999 - Nearby events: https://openairdocs.org/map.md?lat=34.4183&lon=-118.5150&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report June 8, 2005 - Report: Approved by Office Director - Parties: Federal Aviation Administration - NTSB case key (mKey): 59663 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX04LA265 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/59663/pdf - Page: https://openairdocs.org/ntsb/LAX04LA265 ## Probable cause the pilot's inadequate planning/decision by his inadequate evaluation of the weather resulting in an attempt to conduct flight beyond the aircraft's climb performance capability. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - In flight encounter with weather, climb - to cruise - terrain condition - mountainous/hilly - planning/decision - inadequate, pilot in command (cause) - weather evaluation - inadequate, pilot in command (cause) - weather condition - temperature,high - weather condition - high density altitude (cause) - aircraft performance,climb capability - exceeded (cause) - precautionary landing - performed, pilot in command - On ground/water collision with object, landing - roll - terrain condition - rock(s)/boulder(s) ## Analysis The pilot made a precautionary landing in a field and the airplane collided with a rock. When he departed, the ambient temperature was about 80 degrees F. As he progressed northbound while climbing toward mountainous terrain, the temperatures exceeded 100 degrees F. When the airplane was about 2,500 feet msl, it would not climb and the engine temperature gauge was indicating 240 degrees F. The pilot attempted to return to a nearby airport; however, he could not attain the altitude needed to transition through a mountain pass to the airport. He made a precautionary landing in a field. A Federal Aviation Administration inspector performed a post accident test-run on the engine, and it operated normally. The density altitude at the accident site was calculated to be in excess of 5,300 feet. ## Factual narrative On July 12, 2004, at 1730 Pacific daylight time, an Ercoupe 415-D, N3837H, collided with a rock during a precautionary landing to a field in Santa Clarita, California. The private pilot, also the registered owner, was operating the airplane under the provisions of 14 CFR Part 91. The pilot, the sole occupant, was not injured. The airplane sustained substantial damage. Visual meteorological conditions prevailed for the flight, and no flight plan had been filed. The airplane departed about 1630 from the Santa Monica Municipal Airport, Santa Monica, California, and was destined for Modesto City County-Harry Sham Field, Modesto, California. According to the pilot, after departure from Santa Monica, he climbed to 1,800 feet mean sea level (msl), which he maintained while crossing through the Van Nuys, California, airspace. As he began his climb northbound, he encountered turbulence. Approximately 2,500 feet msl, the airplane was not climbing and the oil temperature gauge was indicating 220 degrees Fahrenheit (F). The pilot elected to reverse course and return to Whiteman Airport, Pacoima, California; however, during the turn he lost altitude and the airplane would not climb. Assuming that he would not be able to attain the altitude needed to transition through the Newhall Pass, the pilot made a precautionary landing in a field. During the landing roll, the left main landing gear collided with a rock and sheared off, resulting in substantial damage to the main spar. The pilot manually shutdown the engine after the landing. The pilot stated that his engine was running normally, but the temperature was warmer than he expected after his departure. When he departed, the temperature was about 80 degrees F; as he progressed northward, the temperatures exceeded 100 degrees F. Post accident examination and a test-run by a Federal Aviation Administration inspector did not reveal any operating anomalies with the engine. The inspector did note that the air filter was dirty. The density altitude at the accident site was calculated to be in excess of 5,300 feet. ## Aircraft - Registration: [N3837H](https://openairdocs.org/deregistered/N3837H-2013-08-19), registration cancelled 2013-08-19, S/N 4538, built 1947 (OpenAirDocs) - Reported make and model: Ercoupe 415-D - Registry model: [Ercoupe 415-D](https://openairdocs.org/model/ercoupe-415-d) (registry code 0420326) (OpenAirDocs) - Registry engine: [Continental C85 series](https://openairdocs.org/engine/continental-c85-series) (registry code 17008, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 4538 - Airframe hours: 2750 - Engines: Continental C-85 85 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Eugene Evans - Airworthiness certificate: Standard, Normal - Last inspection: Annual, July 1, 2003 - Departed: SMO, Santa Monica, CA - Destination: MOD, Modesto, CA ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 70; injuries: none; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; last flight review August 15, 2003; seat: left; flight hours: 900 total ## Weather - Conditions: Visual (VMC), Day - Wind: 270° at 8 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 93 °F, dew point 27 °F - Altimeter: 29.98 inHg - Observed at: PMD, 30 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 20040712021809A](https://openairdocs.org/incident/20040712021809A), Jul 12, 2004: Univar 415D, Santa Clarita, CA, Substantial damage. (-23) While enroute from ksmo to kmod, pilot reported that aircraft could not gain altitude above 2400' MSL while over castaic area. Pilot elected to return to… 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.