CEN09CA537

NTSB accident investigation · Rewey William M CH 801 · Cottage Grove, WI · August 23, 2009

Accident · No injuriesData collectionFinal report
Date
August 23, 2009, 11:28 local (16:28 UTC)
Place
Cottage Grove, WI
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N171WRRewey William M CH 801
Defining event
Initial climb: Fuel starvation
Weather
Visual (VMC) · Day
Status
Completed · report December 15, 2009
Report
Approved by Office Director
NTSB office
Central Region
Parties
FAA-Milwaukee FSDO
FAA report
20090823048989A
Case key
74581

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 total loss of engine power during initial climb due to fuel starvation from a blocked fuel screen that resulted from the pilot/owner's inadequate inspection and maintenance of the fuel system.

Findings · 3

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.

Engine fuel and control: fuel control/carburetorAircraft › Aircraft power plant · Inadequate inspectionRewey William M CH 801: 1 caseAll aircraft: 195 casesProbable cause
Inspection: scheduled/routine inspectionPersonnel issues › Task performance · Owner/builderRewey William M CH 801: 1 caseAll aircraft: 167 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 reported that the takeoff and initial climb were normal, but that, about 300 feet above ground level, the engine lost power. He lowered the airplane’s nose to establish a glide and set-up for a forced landing. He executed an emergency landing to an area of tall grass adjacent to a pond. The pilot noted that the airplane “stalled out perhaps 5 [feet] or 10 [feet] above the 5 [foot] high grass--then came down hard.” The airplane sustained substantial damage to the rear wing spar and attachment fittings. A postaccident inspection revealed that the carburetor fuel inlet screen was blocked with metal particles, sand, dirt, insects and other debris. The pilot stated that although he had inspected the gascolator screen, he had not inspected the fuel system screens. The pilot was also the owner and builder of the amateur-built airplane.

Factual narrative

The pilot reported that the takeoff and initial climb were normal. He stated that about 300 feet above ground level (agl), the engine lost power. He lowered the airplane’s nose to establish a glide and set-up for a forced landing. He executed an emergency landing to an area of tall grass adjacent to a pond. The pilot noted that the airplane “stalled out perhaps 5 [feet] or 10 [feet] above the 5 [foot] high grass – then came down hard.” The airplane sustained substantial damage to the rear wing spar and attachment fittings. A post accident inspection revealed that the carburetor fuel inlet screen was blocked with metal particles, sand, dirt, insects and other debris. The pilot stated that although he had inspected the gascolator screen, he had not inspected the fuel system screens. The pilot was also the owner and builder of the amateur-built airplane.

Aircraft

Registration
N171WR
Reported as
Rewey William M CH 801
Category
Airplane, amateur-built
Serial number
84197
Airframe hours
37
Engine
Lycoming O-320 SERIES, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · November 13, 2008
Departed
87Y · Cottage Grove, WI
Destination
87Y · Cottage Grove, WI
Airport
87Y · Blackhawk Airfield, runway 09, 2,203 × 56 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
81
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Last flight review
June 25, 2008
Seat
Left
Flight hours
3,500 total · 40 in this make and model · 3,400 as pilot in command · 6 in the last 90 days · 2 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
10° at 3 knots
Visibility
10 statute miles
Lowest ceiling
2,600 ft broken
Temperature
68 °F, dew point 54 °F
Altimeter
30.12 inHg
Observed at
MSN, 7 nm away

Docket · 1

The files NTSB released with the investigation on October 1, 2009, on NTSB’s docket system: statements, records, photos and specialists’ reports. 749 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.