# NTSB SEA04LA004: Seabase Magnum, N1966G, Olney, MT, October 9, 2003 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: October 9, 2003, 17:00 local (23:00 UTC) - Place: Olney, MT - Coordinates: 48.563331, -114.57833 - Nearby events: https://openairdocs.org/map.md?lat=48.5633&lon=-114.5783&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 2, 2004 - Report: Approved by Office Director - Parties: FAA/FSDO - NTSB case key (mKey): 58152 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA04LA004 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/58152/pdf - Page: https://openairdocs.org/ntsb/SEA04LA004 ## Probable cause The pilot's failure to adequately preflight the aircraft to verify the fuel quantity, resulting in fuel exhaustion and the loss of engine power during cruise flight. Contributing factors were the pilot's failure to refuel the aircraft and the soft terrain. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power(total) - nonmechanical, cruise - fluid,fuel - exhaustion (cause) - aircraft preflight - inadequate, pilot in command (cause) - refueling - not performed, pilot in command (contributing factor) - Forced landing, descent - emergency - On ground/water encounter with terrain/water, emergency landing - terrain condition - soft (contributing factor) - Nose over, emergency landing ## Analysis The pilot reported that he had just picked up the aircraft at the completion of some maintenance work and was returning to his home base. Prior to departure, the pilot preflighted the aircraft, but did not pull the fuel caps to visually check fuel quantity, instead the pilot checked the caramel colored sight glass in the cockpit, which when the fuel tanks are full, the sight window looks the same as when empty. The pilot stated that he assumed that the aircraft had been fueled, however, it had not during its stay for maintenance. After departure, and while in cruise at 4,500 feet above sea level, the engine abruptly stopped operating. Upon determining that the automobile traffic on a nearby highway was too dense to risk a landing he selected a series of fields just east of the highway. Two fences sectioned the fields across the intended landing path, and the surface of the fields was soft and mushy. During the landing roll, the nose dug in, the nose landing gear collapsed and the aircraft nosed over. A Federal Aviation Administration Inspector examined the aircraft the day following the accident and found no gas within the fuel tanks or the fuel strainer. ## Factual narrative On October 9, 2003, approximately 1700 mountain daylight time, a homebuilt Seabase (Avid) Magnum, N1966G, registered to and operated by an individual and being flown by a private pilot sustained substantial damage during the landing roll and subsequent nose over following a total loss of power near Olney, Montana. The pilot was uninjured. Visual meteorological conditions existed and no flight plan had been filed. The flight was operated under 14 CFR 91 and originated from Kalispell, Montana (FCA), at 1636 local and was destined for Eureka, Montana (88M). The pilot reported that he had flown the experimentally certificated aircraft, which had approximately 19 hours total time, to Kalispell for some maintenance work for the owner. The pilot stated that when he picked the aircraft up, he checked the repairs and then preflighted the aircraft. During the preflight, the pilot stated that he did not pull the fuel caps to visually check the fuel level, instead, he relied on the caramel colored sight glass in the cockpit. The pilot reported that when the tanks are full, the sight window looks the same as when empty, and further stated, "My assumption, and mistake, was to think it had been filled and not confirm this by pulling caps." The aircraft was not fueled during its stay in Kalispell and the pilot reported that he was unaware that the aircraft's engine had been operated between his arrival and departure from Kalispell. He subsequently departed Kalispell and while in cruise at 4,500 feet above sea level the engine abruptly stopped operating just north of Olney. Upon determining that the automobile traffic on highway 93 was too dense to risk a landing he selected a series of fields just east of the highway. Two fences sectioned the fields across the intended landing path, and the surface of the fields was soft and mushy. During the landing roll, the nose dug in, the nose landing gear collapsed and the aircraft nosed over. An inspector assigned to the Federal Aviation Administration's Helena Flight Standards District Office examined the aircraft the day following the accident and found no gas within the fuel tanks or the fuel strainer. ## Aircraft - Registration: [N1966G](https://openairdocs.org/deregistered/N1966G-2009-09-04), registration cancelled 2009-09-04, S/N 31, built 2002 (OpenAirDocs) - Reported make and model: Seabase (Avid) Magnum - Registry model: [Seabase Thomas M SEABASE MAGNUM](https://openairdocs.org/model/seabase-thomas-m-seabase-magnum) (registry code 056146J) (OpenAirDocs) - Registry engine: [Lycoming O-360-A1A](https://openairdocs.org/engine/lycoming-o-360-a1a) (registry code 41594, 4 cycle) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 31 - Airframe hours: 296 - Engines: Lycoming O-360-A1A 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Rick Lynn - Registered owner: Orr, Clyde W. - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Condition, March 22, 2001, 20 hours before - Departed: FCA, Kalispell, MT - Destination: 88M, Eureka, MT ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 39; injuries: none; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; last flight review October 16, 2002; seat: left; flight hours: 78 total, 3 in this make and model, 19 as pilot in command, 2 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 210° at 14 knots - Visibility: 10 statute miles - Lowest ceiling: 7,500 ft broken - Temperature: 54 °F, dew point 27 °F - Altimeter: 29.84 inHg - Observed at: FCA, 20 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 20031009024879A](https://openairdocs.org/incident/20031009024879A), Oct 9, 2003: Amtr MAGNUM, Olney, MT, Substantial damage. (-23) On October 9, 2003, at 1700 MDT, an experimental kit airplane, N1966G, owned by [privacy data omitted], crashed while attempting a landing without power.… 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.