ANC95LA005

NTSB accident investigation · Aeronca Sedan AR-15 · Nikolai, AK · October 21, 1994

Accident · No injuriesLimited investigationFinal report
Date
October 21, 1994, 13:30 local (21:30 UTC)
Place
Nikolai, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N1428HAeronca Sedan AR-15
Weather
Visual (VMC) · Day
Status
Completed · report June 29, 1995
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19941021035649A
Case key
2606

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 NTSB’s determination of the probable cause, and any contributing factors.

The pilot's continued flight into adverse weather. Factors to the accident were falling snow, an obstruction of the fuel system vents, restriction of the fuel flow and lack of a suitable landing area.

Analysis

During a cross-country flight, the pilot was flying in moderate falling snow conditions for about 30 minutes and experienced a loss of engine power. The pilot could not maintain altitude and performed a forced landing. During the landing roll, the landing gear struck a log, damaging the gear and fuselage. After landing, the pilot attempted to drain fuel from the fuel tanks and heard air being sucked into the tanks until the internal pressure of the tanks equalized. The airplane's fuel system vents are located on the belly of the fuselage.

Factual narrative

On October 21, 1994 at 1330 Alaska daylight time, a wheel equipped Aeronca Sedan, AR-15 airplane, N1428H, registered to and operated by the Pilot, was forced to land on a gravel bar after a loss of power, and struck a log during the landing roll, near Nikolai, Alaska. The business flight, operating under 14 CFR Part 91, departed Willow, Alaska, and the destination was Takotna, Alaska. No flight plan was filed but the Pilot's wife was aware of the route of flight. Visual meteorological conditions prevailed. The airplane was substantially damaged and the Pilot, the sole occupant, was not injured.

According to the Pilot, while he was in cruise flight the engine began to lose power. He was unable to keep the engine running and landed on a gravel bar on the South Fork of the Kuskokwim River. During the landing roll he struck a log and damaged the landing gear and the lower longerines of the fuselage. The Pilot stated he attempted to drain a fuel sample from the wing tanks and when he depressed the fuel drain, the fuel tank sucked air. He was able to hear the air gurgle in the fuel tank until the pressure equalized. The Pilot stated that the fuel tank vents are on the belly of the airplane and he had been flying through wet snow for the previous 30 minutes.

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(partial) - nonmechanicalCruise
Weather condition - snowFactor
Fuel system,vent - obstructedFactor
Fluid,fuel - flow restrictedFactor
Flight into adverse weather - continuedPilot in commandCause
Forced landingEmergency descent/landing
On ground/water collision with objectEmergency descent/landing
Object - tree(s)
Terrain condition - none suitableFactor

Aircraft

Registration
N1428H
Reported as
Aeronca Sedan AR-15 (SEDAN AR-1)
Category
Airplane
Serial number
S15AC489
Airframe hours
2,900
Engine
Continental O-300, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Business · Part 91
Operator
Warner, Walt
Registered owner
Warner, Bonnie
Airworthiness certificate
Standard, Normal
Last inspection
Annual · January 24, 1994 · 119 hours before
Departed
Z22 · Willow, AK
Destination
TCT · Takotna, AK

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
Certificates
Airline transport, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
7,000 total · 140 in this make and model · 6,950 as pilot in command · 50 in the last 90 days · 25 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
5 statute miles
Lowest ceiling
4,000 ft overcast

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.