ANC04CA089

NTSB accident investigation · Aeronca 15AC · Big lake, AK · August 7, 2004

Accident · No injuriesData collectionFinal report
Date
August 6, 2004, 17:15 local (Aug 7, 2004, 01:15 UTC)
Place
Big lake, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N4433NAeronca 15AC
Weather
Visual (VMC) · Day
Status
Completed · report October 28, 2004
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
20040806018279A
Case key
59848

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 inadequate evaluation of the weather conditions and subsequent collision with high vegetation during the initial climb after takeoff, which resulted in a collision with the ground. Factors contributing to the accident were the presence of a tailwind and bushes at the end of the airstrip.

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.

In flight collision with terrain/waterTakeoff - initial climb
Terrain condition - high vegetationFactor
Weather condition - tailwindFactor
Weather evaluation - inadequatePilot in commandCause
Terrain condition - ground

Analysis

The private certificated pilot was departing toward the northeast from a private airstrip that was about 1,300 feet long. There were power lines and trees at the southwest end of the airstrip. The pilot reported that the weather conditions included a temperature of about 85 degrees F, and the wind conditions were from the southwest, about 15 to 20 knots. He said he decided to depart downwind, toward the northeast, because of the obstructions at the southwest end of the strip. During the takeoff, the pilot indicated that the airplane lifted off at the end of the strip, but the left main landing gear tire and the left wing clipped bushes about 5 to 10 feet above the ground. The airplane then nosed into the ground and received structural damage to the right wing and the right wing lift strut.

Factual narrative

On August 6, 2004, about 1715 Alaska daylight time, a tundra tire-equipped Aeronca 15AC airplane, N4433N, sustained substantial damage when it collided with bushes and then the ground during takeoff initial climb from a private airstrip, located about 4 miles northwest of Big Lake, Alaska. The airplane was being operated as a visual flight rules (VFR) local area personal flight under Title 14, CFR Part 91, when the accident occurred. The airplane was operated by the pilot. The private certificated pilot, the sole occupant, was not injured. Visual meteorological conditions prevailed. No flight plan was filed, nor was one required.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on August 6, the pilot reported that the gravel surfaced airstrip is about 1,300 feet long and 40 feet wide, and is oriented southwest/northeast. There are power lines and trees at the southwest end of the airstrip. The pilot reported that the weather conditions included a temperature of about 85 degrees F, and the wind conditions were from the southwest, about 15 to 20 knots. He noted that a portion of the airstrip was obscured by dust as he taxied for takeoff. He said he decided to depart downwind, toward the northeast because of the obstructions at the southwest end of the strip. During the takeoff, the pilot indicated that the airplane lifted off at the end of the strip, but the left main landing gear tire and the left wing clipped bushes about 5 to 10 feet above the ground. The airplane then nosed into the ground and received structural damage to the right wing and right wing lift strut.

Aircraft

Registration
N4433N
Reported as
Aeronca 15AC
Category
Airplane
Serial number
322
Engine
Continental C-145, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
David D. Schwartz
Registered owner
David D. Swartz
Airworthiness certificate
Standard, Normal
Departed
Big lake, AK
Destination
PABV · Chugiak, 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
41
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3
Flight hours
185 total · 53 in this make and model · 9 in the last 90 days · 9 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
195° at 15 knots, gusting 20
Temperature
84 °F

FAA reports on this event · 1

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

Other investigations on N4433N · 1

Matched to the same aircraft by N-number and date.