ANC07LA058

NTSB accident investigation · Cessna 150 · Fairbanks, AK · June 28, 2007

Accident · Minor injuriesLimited investigationFinal report
Date
June 28, 2007, 11:30 local (19:30 UTC)
Place
Fairbanks, AK
Injuries
2 minor
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N66655Cessna 150
Weather
Visual (VMC) · Day
Status
Completed · report March 31, 2008
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA-AL-FAI FSDO 01
FAA report
20070628012119A
Case key
66109

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

A partial loss of engine power due to a stuck engine exhaust valve during takeoff initial climb. A contributing factor was the airplane's excessive gross weight.

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) - mech failure/malfTakeoff - initial climb
Aircraft weight and balance - exceededPilot in command(cfi)Factor
Engine assembly,valve,exhaust - binding(mechanical)Cause
Forced landingEmergency landing after takeoff
In flight collision with objectEmergency landing after takeoff
Object - tree(s)

Analysis

The private certificated pilot/owner, along with a flight instructor, departed on the initial portion of a CFR Part 91 flight review. The airplane engine began to lose power about 50 feet agl, and would not maintain altitude. A forced landing area was selected on a road, but the airplane struck several trees before colliding with the ground. An FAA inspector reported that an examination of the engine disclosed that the number 1 cylinder had no compression because the exhaust valve was stuck in the open position, resulting in a substantial loss of engine power. Additionally, the inspector found that the airplane was about 70 pounds over its maximum gross weight, reducing its climb performance.

Factual narrative

On June 28, 2007, about 1130 Alaska daylight time, a Cessna 150 airplane, N66655, sustained substantial damage when it collided with trees following a loss of engine power during takeoff-initial climb from the Chena Marina Airport, about 3 miles southwest of Fairbanks, Alaska. The airplane was being operated by the pilot as a visual flight rules (VFR) local area flight review under Title 14, CFR Part 91, when the accident occurred. The private certificated pilot/owner and the certificated flight instructor, received minor injuries. 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 June 28, the owner reported that he was seated in the left seat, and the flight instructor was in the right seat, and the accident takeoff was the initial flight portion of the flight review. The owner said that about 50 feet agl, the engine began to lose power, and the airplane was unable to maintain altitude. He relinquished the flight controls to the flight instructor, who then selected a forced landing area on a road. The airplane struck several trees before colliding with the ground.

A Federal Aviation Administration (FAA) inspector, Fairbanks Flight Standards District Office (FSDO), Fairbanks, responded to the scene, conducted an examination of the airplane, and interviewed the two pilots. On June 29, the inspector reported that the airplane owner was utilizing auto fuel, and departed with about 27 gallons of fuel. His calculation of the airplane's gross weight at the time of the accident indicated the airplane was about 70 pounds over its maximum limit of 1,600 pounds.

The flight instructor submitted a Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1). In the section of the report titled: "How could this accident have been prevented," the instructor wrote, "No excuse for weight/balance."

On July 12, the inspector examined the engine at a maintenance facility, and found that the number one cylinder had no compression. The number one cylinder exhaust valve was stuck in the open position.

Aircraft

Registration
N66655
Reported as
Cessna 150
Category
Airplane
Serial number
15076187
Engine
Continental O-200, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Registered owner
Robert C. Miller
Airworthiness certificate
Standard, Utility; Standard, Normal
Last inspection
Annual · January 1, 2007 · 1 hours before
Departed
AK28 · Fairbanks, AK
Airport
AK28 · Chena Marina

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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Flight instructor
Age
68
Injuries
Minor
Certificates
Flight instructor, Commercial
Airplane ratings
Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
March 1, 2006
Seat
Right
Flight hours
5,481 total · 300 in this make and model · 5,340 as pilot in command · 57 in the last 90 days · 32 in the last 30 days
Role
Pilot
Age
65
Injuries
Minor
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
July 1, 2004
Seat
Left
Flight hours
778 total · 400 in this make and model · 656 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 4 knots
Visibility
10 statute miles
Lowest ceiling
20,000 ft broken
Temperature
72 °F, dew point 46 °F
Altimeter
29.90 inHg
Observed at
PAFA, 3 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.