ERA10LA349

NTSB accident investigation · Beech F33A · Mooresville, NC · July 6, 2010

Accident · No injuriesLimited investigationFinal report
Date
July 6, 2010, 18:30 local (22:30 UTC)
Place
Mooresville, NC
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N350NWBeech F33A
Defining event
Approach-VFR pattern base: Loss of engine power (total)
Weather
Visual (VMC) · Day
Status
Completed · report June 27, 2011
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20100706037379A
Case key
76535

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 for undetermined reasons.

Findings · 1

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.

Not determinedNot determined › Not determined · Unknown/Not determinedBeech F33A: 8 casesAll aircraft: 2,247 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

Because the airplane had not flown for an extended period of time, the pilot elected to fly the airplane to his home in order to run the engine. During the preflight inspection, the pilot removed trace amounts of water and contaminants by draining fuel samples from the fuel tanks several times. The pilot subsequently departed and the flight proceeded uneventfully. Upon entering the traffic pattern at the destination airport, the pilot activated the fuel boost pump according to the airplane's before-landing checklist. Immediately after the fuel pump activated, the engine began to lose power, and after turning off the fuel boost pump the pilot attempted to restart the engine. The pilot subsequently performed a forced landing to a lake, resulting in substantial damage to the fuselage and left wing tip. Postaccident inspection revealed no evidence of any obvious mechanical deficiencies of the engine, though an attempted test run of the engine was unsuccessful.

Factual narrative

On July 6, 2010, about 1830 eastern daylight time, a Beech F33A, N350NW, was substantially damaged during a forced landing to a lake following a loss of engine power while in the traffic pattern at Lake Norman Airpark (14A), Mooresville, North Carolina. The certificated private pilot was not injured. Visual meteorological conditions prevailed, and no flight plan was filed for the personal flight, which originated from Piedmont Triad International Airport (GSO), Greensboro, North Carolina, about 1800. The flight was conducted under the provisions of 14 Code of Federal Regulations Part 91. During a telephone interview, the pilot stated that the airplane was being brokered for sale, and had not flown for an extended period. He elected to fly the airplane to his home located near 14A in order to "exercise" it. During the prefight inspection, the pilot noted that all of the fuel tanks contained fuel, and that he "sumped" the main fuel tanks several times to verify that the trace amount of water and contaminants, he observed in the first sample, were removed. The pilot attempted to start the engine but discovered the battery voltage was too low due to the airplane's extended period of inactivity. It was subsequently started with assistance from an external power supply. During the engine run-up, prior to takeoff, the pilot reported that there were indications of "fouled [spark] plugs which did clean up after [the] leaning procedures." He did not note any other abnormalities with the airplane before takeoff. After departing from GSO, the pilot climbed the airplane to the planned cruise altitude of 6,500 feet mean sea level. During the descent, the pilot reviewed the supplemental before landing checklist, and maneuvered the airplane to enter the traffic pattern. During the downwind to base turn, about 500 feet above ground level, the pilot began the final checklist for landing and activated the fuel boost pump. Immediately after the fuel pump activated, the engine began to "sputter" and lose power. The pilot quickly turned off the fuel boost pump and performed the emergency procedures checklist to restart the engine. He elected to land in Lake Norman and attempted to restart the engine several times before impacting the water. A Federal Aviation Administration (FAA) inspector examined the airplane after it was recovered from the lake. The airplane exhibited substantial damage along the right side of the fuselage and the left wing tip fuel tank. The fuselage was buckled aft of the right cabin door and the left wing fuel tip tank was dented along the aft outboard section of the tank. According to FAA records, the airplane was manufactured in 1977, and most recently registered to in 2003. It was equipped with a 350-horsepower, Lycoming TIO-540 series engine, which was installed under the provisions of a supplemental type certificate. It was a four-place, all-metal, low-wing, single-engine, monoplane with retractable tricycle landing gear. According to thepilot, the airplane had accumulated approximately 2,740 hours of total time in service as of last annual inspection, which was performed on November 17, 2009. The FAA inspector examined the engine in Clayton, Georgia on July 29, 2010. The engine crankshaft was rotated by hand at the propeller and continuity of the crankshaft and valvetrain to the accessory section of the engine was confirmed. Thumb compression was confirmed on all cylinders. The spark plugs were removed and exhibited normal wear. Examination of the magnetos revealed water in the housing, and rotation of the magneto failed to produce spark. The water was drained, but neither produced any spark. The turbo charger moved freely with no blockage or oil contamination noted. The inspector attempted to initiate a test run of the engine, but was unsuccessful. The pilot held a private pilot certificate with ratings for airplane single-engine land, multiengine land, and instrument airplane. His most recent FAA second class medical certificate was issued on May 26, 2009. The pilot reported 3,757 total hours of flight experience, of which, 25 hours were in the accident airplane make and model. The 1952 recorded weather at Statesville Regional Airport, located about 9 miles north of the accident location, included calm winds, scattered clouds at 9,000 feet, 10 miles visibility, temperature 31 degrees C, dewpoint 14 degrees C, and an altimeter setting of 30.10 inches of mercury.

Aircraft

Registration
N350NW
Reported as
Beech F33A
Category
Airplane
Serial number
CE-753
Airframe hours
2,740
Engine
Lycoming TIO-540, 350 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Utility
Last inspection
Annual · November 17, 2009
Departed
GSO · Greensboro, NC
Destination
14A · Mooresville, NC
Flight plan
Unknown
Airport
14A · Lake Norman Airpark

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
54
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
August 5, 2009
Seat
Left
Flight hours
3,757 total · 25 in this make and model · 3,700 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
190° at 3 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
90 °F, dew point 55 °F
Altimeter
30.10 inHg
Observed at
SVH, 9 nm away

Docket · 6

The files NTSB released with the investigation on April 22, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 902 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 N350NW · 2

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