ANC07LA064

NTSB accident investigation · Champion 7GCB · King Salmon, AK · July 11, 2007

Accident · No injuriesLimited investigationFinal report
Date
July 10, 2007, 17:00 local (Jul 11, 2007, 01:00 UTC)
Place
King Salmon, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N9897YChampion 7GCB
Weather
Visual (VMC) · Day
Status
Completed · report November 29, 2007
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Anchorage FSDO-03
FAA report
20070710017569A
Case key
66163

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

On this page

Probable cause

The pilot's selection of unsuitable terrain for takeoff, which resulted in the right main landing gear collapsing during takeoff. Factors contributing to the accident were rough/uneven terrain, and the collapse of the main landing gear.

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.

On ground/water encounter with terrain/waterTakeoff - roll/run
Terrain condition - rough/unevenFactor
Landing gear,main gear - collapsedFactor
Unsuitable terrain or takeoff/landing/taxi area - selectedPilot in commandCause
Loss of control - in flightTakeoff - initial climb
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - rough/uneven

Analysis

The commercial certificated pilot was taking off in a tundra tire-equipped airplane from a rough/uneven off-airport site under Title 14, CFR Part 91. He said his passenger reported hearing a thud or bang just prior to lifting off. The takeoff area was predominately gravel with some larger rocks, and the pilot reported that as the airplane lifted off, it immediately veered to the right. He said regardless of his control inputs, the airplane continued to the right, and impacted the ground. The pilot said the right main landing gear separated during takeoff, and the airplane did not have enough flying speed to overcome the drag. He said the airplane sustained damage to the right wing, right landing gear, fuselage, and propeller. In a written statement, the pilot wrote that more careful landing area selection might have prevented the accident.

Factual narrative

On July 10, 2007, about 1700 Alaska daylight time, a tundra tire-equipped Champion 7GCB airplane, N9897Y, sustained substantial damage when the right main landing gear failed during takeoff, and impacted the ground, about 35 miles southeast of King Salmon, Alaska. The airplane was being operated by the pilot as a visual flight rules (VFR) personal cross-country flight under Title 14, CFR Part 91, when the accident occurred. The commercial certificated pilot and sole passenger were not injured. Visual meteorological conditions prevailed, and no flight plan was filed.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on July 11, the pilot said that his passenger reported hearing a thud or bang just prior to the airplane lifting off. He said the takeoff area was predominately gravel with some larger rocks. The pilot reported that as the airplane lifted off, it immediately veered to the right. He said regardless of his control inputs, the airplane continued to the right, and impacted the ground. The pilot thought the right landing gear might have separated during takeoff, and the airplane did not have enough flying speed to overcome the drag. He said the airplane sustained damage to the right wing, right landing gear, fuselage, and propeller.

In a written statement to the NTSB dated July 13, the pilot wrote that more careful landing area selection might have prevented the accident.

Aircraft

Registration
N9897Y
Reported as
Champion 7GCB
Category
Airplane
Serial number
7GCB-117
Airframe hours
2,000
Engine
Lycoming O-320-A2B, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Dave Cox
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 1, 2007
Departed
King Salmon, AK
Destination
PAKN · King Salmon, 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
57
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
February 1, 2006
Seat
Front
Flight hours
6,000 total · 300 in this make and model · 6,000 as pilot in command · 200 in the last 90 days · 50 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 10 knots
Visibility
20 statute miles

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 N9897Y · 2

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