SEA04LA004

NTSB accident investigation · Seabase Magnum · Olney, MT · October 9, 2003

Accident · No injuriesLimited investigationFinal report
Date
October 9, 2003, 17:00 local (23:00 UTC)
Place
Olney, MT
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N1966GSeabase Magnum
Weather
Visual (VMC) · Day
Status
Completed · report June 2, 2004
Report
Approved by Office Director
Parties
FAA/FSDO
FAA report
20031009024879A
Case key
58152

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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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

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of engine power(total) - nonmechanicalCruise
Fluid,fuel - exhaustionCause
Aircraft preflight - inadequatePilot in commandCause
Refueling - not performedPilot in commandFactor
Forced landingDescent - emergency
On ground/water encounter with terrain/waterEmergency landing
Terrain condition - softFactor
Nose overEmergency 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
Reported as
Seabase Magnum
Category
Airplane, amateur-built
Serial number
31
Airframe hours
296
Engine
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

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
39
Injuries
None
Certificate
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.