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NTSB Report

May 20, 2006 · Helio H-250 · N6324V

Anchorage, AK

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
May 20, 2006
Injury Outcomes
No injuries (2 uninjured)
Location
Anchorage, AK
Aircraft
Helio H-250
Tail Number
N6324V
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC06LA072

The private certificated pilot was departing a grass surface runway on a Title 14, CFR Part 91 personal flight. The runway was about 3,000 feet long, and about 150 feet wide. The pilot said that during the takeoff run, the engine did not seem to be producing full power. The airplane lifted off to about 10 feet above ground level, but the pilot decided to abort the takeoff and pulled the throttle to idle. The airplane landed hard and began to veer to the left. The pilot said the airplane ground looped to the left, departed off the left side of the runway, and collided with alder bushes. The airplane received structural damage to the right main landing gear, and the left wing and left aileron. The pilot reported that the airplane engine did not have any mechanical malfunction. He said that after the accident, he discovered that the carburetor heat control was in the "on" position.

NTSB Probable Cause

The pilot's improper use of the carburetor heat control during takeoff, which resulted in a partial loss of engine power, a hard landing, and an on ground encounter with terrain. A factor contributing to the accident was an inadvertent ground loop.

Full Narrative

On May 19, 2006, about 1830 Alaska daylight time, a wheel-equipped Helio H-250 airplane, N6324V, sustained substantial damage when it departed the runway surface following an aborted takeoff from a remote airport, about 14 miles northwest of Anchorage, 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 and the sole passenger were not injured. Visual meteorological conditions prevailed, and no flight plan was filed. The flight originated at the Little Su Lodge, and was en route to Merrill Field, Anchorage. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on June 21, 2006, the pilot reported that he was departing toward the south on a grass surface runway that was oriented north/south. The runway was about 3,000 feet long, and about 150 feet wide. The pilot said that during the takeoff run, the engine did not seem to be producing full power. The airplane lifted off to about 10 feet above ground level (agl), but the pilot decided to abort the takeoff and pulled the throttle to idle. The airplane landed hard and began to veer to the left. The pilot said the airplane ground looped to the left, departed off the left side of the runway, and collided with alder bushes. The airplane received structural damage to the right main landing gear, and the left wing and left aileron. The pilot reported that the airplane engine did not have any mechanical malfunction. He said that after the accident, he discovered that the carburetor heat control was in the "on" position. The pilot did not submit a Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1).

Flight

Event TypeAccident
Event Time18:30 AKDT
Nearest AirportLittle Su Lodge (0nm)
Runway18
Runway Length3000 ft
Runway Width150 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftHelio H-250
Tail NumberN6324V
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-540 · Reciprocating · 250
Seats4

People & Injuries

Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 58 · Third Class · None

Conditions

ConditionsVMC
LightDaylight
Wind180° @ 10 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point55 / 0 C
Altimeter0
Weather SourcePILO

Appendix: Source Data