WPR10CA401

NTSB accident investigation · Cessna 180D · Hillsboro, OR · August 13, 2010

Accident · Minor injuriesData collectionFinal report
Date
August 13, 2010, 16:00 local (23:00 UTC)
Place
Hillsboro, OR
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N6475XCessna 180D
Defining event
Approach-VFR pattern base: Loss of engine power (total)
Weather
Visual (VMC) · Day
Status
Completed · report March 16, 2011
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
FAA report
20100813041279A
Case key
76958

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 loss of engine power due to fuel starvation resulting from unporting when the pilot entered into a slip during the turn to the final approach leg.

Findings · 2

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Performance/control parameters: yaw controlAircraft › Aircraft oper/perf/capability · Not specifiedCessna 180D: 1 caseAll aircraft: 149 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Incorrect use/operationCessna 180D: 1 caseAll aircraft: 1,695 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot performed a preflight inspection for the cross-country flight, which included checking the fuel tanks. He used a calibrated stick and determined that he had 15 gallons in the right fuel tank and 10 gallons in the left fuel tank; he flew the majority of the flight with the right fuel tank selected. Upon reaching the destination airport, as he was switching from the right fuel tank position to the "BOTH" position, the engine surged. As the pilot made a left turn onto the base leg of the traffic pattern, he noted that the airplane was slightly high. He initiated a left slip to lose altitude. When he leveled the airplane, the engine began to surge as if it were out of fuel. The pilot reported that he tried to maintain engine power by pumping the throttle back and forth, but was unable to retain power. Determining that he would not be able to maneuver the airplane to the runway, the pilot opted to perform a forced landing on a dirt path. The airplane landed hard and the right main landing gear collapsed. The pilot reported that there were no mechanical problems with the airplane. Cessna issued guidance to pilots not to perform slips with less than 1/4 tank of fuel; however, the guidance was issued after the airplane's handbook was published. The pilot further stated that if he had maintained a correct airspeed for the approach, it would not have been necessary for him to maneuver the airplane in a slip.

Factual narrative

The pilot performed a preflight inspection for the cross-country flight, which included checking the fuel tanks. He used a calibrated stick, and determined that he had 15 gallons in the right fuel tank and 10 gallons in the left fuel tank; he flew the majority of the flight with the right fuel tank selected. Upon reaching the destination airport, as he was switching from the right fuel tank position to the BOTH position, the engine surged. As the pilot made a left turn onto base, he noted that the airplane was slightly high so he initiated a left slip to lose altitude. When he leveled the airplane, the engine began to surge as if it were out of fuel. The pilot reported that he tried to maintain engine power by “pumping the throttle but was unable to get any power.” The pilot stated that he was not going to make the runway, so he made a forced landing on a dirt path. The airplane landed hard and the right main landing gear collapsed. The pilot reported that there were no mechanical problems with the airplane. Also, his statement noted that he should have been at the correct airspeed for the approach, which would have made it unnecessary to slip the airplane, and that he should not have slipped the airplane to the left in order to keep fuel available to the engine.

Aircraft

Registration
N6475X
Reported as
Cessna 180D
Category
Airplane
Serial number
18050975
Engine
Cont Motor O-470 SERIES, 230 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Departed
BFI · Seattle, WA
Destination
7S3 · Hillsboro, OR
Flight plan
Company VFR
Airport
7S3 · Stark's Twin Oaks Airpark, runway 02, 2,465 × 48 ft, asphalt

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
60
Injuries
Minor
Certificates
Airline transport, Commercial, Student
Airplane ratings
Multi-engine land, Single-engine land, Multi-engine sea, Single-engine sea
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
November 18, 2009
Seat
Left
Flight hours
18,709 total · 1,982 in this make and model · 16,924 as pilot in command · 63 in the last 90 days · 15 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
30° at 15 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
91 °F
Altimeter
29.85 inHg

Docket · 1

The files NTSB released with the investigation on October 1, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 329 KB in all.

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 N6475X · 1

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