# NTSB SEA03LA019: Eurocopter Deutschland EC-135 P1, N311MS, Loon Lake, WA, December 18, 2002 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: December 17, 2002, 21:58 local (Dec 18, 2002, 05:58 UTC) - Place: Loon Lake, WA - Coordinates: 48.06361, -117.621665 - Nearby events: https://openairdocs.org/map.md?lat=48.0636&lon=-117.6217&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 4 uninjured - Status: Completed, report April 23, 2003 - Report: Approved by Office Director - Parties: FAA - FSDO - NTSB case key (mKey): 56217 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA03LA019 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/56217/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=56217 - Page: https://openairdocs.org/ntsb/SEA03LA019 ## Probable cause The pilot's inadvertent flight into instrument meteorological conditions (IMC) while in cruise flight, and an excessive descent rate. Factors include falling snow, whiteout conditions and dark night conditions. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - In flight encounter with weather, cruise - weather condition - snow (contributing factor) - vfr flight into imc - inadvertent, pilot in command (cause) - weather condition - whiteout (contributing factor) - light condition - dark night (contributing factor) - Hard landing, maneuvering - descent - excessive, pilot in command (cause) ## Analysis The pilot reported that when he departed Colville, the weather was mostly clear with a visibility of more than 10 miles. He stated that as the helicopter approached the area around Loon Lake (approximately 30 miles southeast of Colville) they encountered heavy snow showers. The pilot further stated that, "While attempting to slow the helicopter and either turn around or make a precautionary landing on a road (Hwy 395) the helicopter entered a high rate of descent. I ended up making a hard landing on Hwy 395 in pretty much a complete white out." The aviation area forecast (FA) issued at 1945 PST on December 17, valid during the accident time frame, reported widely scattered snow showers East of the Cascades, to include Northeastern Washington. The pilot reported that he obtained a weather briefing via the Data Transmission Network (DTN) prior to the flight from Spokane. ## Factual narrative On December 17, 2002, about 2158 Pacific standard time, a Eurocopter Deutschland EC-135 P1 helicopter, N311MS, sustained substantial damage subsequent to a hard, off-airport landing two miles north of Loon Lake, Washington. The helicopter is owned by INHS Leasing Company, LLC, Spokane, Washington, and was being operated by Metro Aviation, Shreveport, Louisiana, as a visual flight rules (VFR) EMS flight under the provisions of Title 14, CFR Part 135. The airline transport pilot-in-command, the two EMS crewmembers and patient being transported, were not injured in the accident. The flight originated from Mt. Carmel Hospital, Colville, Washington, approximately 15 minutes prior to the accident. The pilot's planned destination was Sacred Heart Medical Center, Spokane, Washington. In a written statement dated December 19, 2002, the pilot reported that when he departed Colville, the weather was mostly clear with a visibility of more than 10 miles. He stated that as the helicopter approached the area around Loon Lake (approximately 30 miles southeast of Colville) they encountered heavy snow showers. The pilot further stated that, "While attempting to slow the helicopter and either turn around or make a precautionary landing on a road (Hwy 395) the helicopter entered a high rate of descent. I ended up making a hard landing on Hwy 395 in pretty much a complete white out." The 2153 weather observation (ASOS) at Deer Park, Washington, 10 miles southeast of the accident site, reported a visibility of 4 statute miles and light snow; scattered clouds at 2,800; broken clouds at 3,700; overcast skies at 4,600; temperature minus 1 degrees Celsius and dew point minus 1 degree Celsius. The aviation area forecast (FA) issued at 1945 PST on December 17, valid during the accident time frame, reported widely scattered snow showers East of the Cascades, to include Northeastern Washington. The pilot reported that he obtained a weather briefing via the Data Transmission Network (DTN) prior to the flight from Spokane. ## Aircraft - Registration: N311MS (not matched to a registry record) - Reported make and model: Eurocopter Deutschland EC-135 P1 - Category: Helicopter - Serial number: 0073 - Airframe hours: 2450 - Engines: Pratt & Whitney PW 206 B 732 horsepower turbo shaft - Damage: Substantial damage - Flight: Part 135 - Operator: Metro Aviation - Registered owner: INHS Leasing Company - Airworthiness certificate: Standard, Normal - Last inspection: AAIP, December 15, 2002, 6 hours before - Departed: Colville, WA - Destination: Spokane, WA - Flight plan: Company VFR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 56; injuries: none; flight instructor, airline transport; airplane ratings: single-engine sea, single-engine land; instrument ratings: helicopter, airplane; medical: class 2, valid medical--w/ waivers/lim; last flight review February 28, 2002; seat: right; flight hours: 10,200 total, 650 in this make and model, 8,200 as pilot in command, 68 in the last 90 days, 25 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 0° at 0 knots - Visibility: 4 statute miles - Lowest ceiling: 3,700 ft broken - Temperature: 30 °F, dew point 30 °F - Observed at: KDEW, 10 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 20021217034119A](https://openairdocs.org/incident/20021217034119A), Dec 17, 2002: Urocop EC135P1, Loonlake, WA, Substantial damage. (-23) Pilot tony paay was returning the EMS flight from colville, WA to spokane, WA when he ran into a bank of fog/snow/imc between chewelah, WA and loon lake,… ## Docket (1 files) The files NTSB released with the investigation on March 17, 2003, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=56217. 323 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 323 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40442372&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-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.