CEN10LA253

NTSB accident investigation · Dearmond Clint RV-6A · Sheboygan, WI · May 16, 2010

Accident · No injuriesLimited investigationFinal report
Date
May 16, 2010, 11:15 local (16:15 UTC)
Place
Sheboygan, WI
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N1257EDearmond Clint RV-6A
Defining event
Enroute-cruise: Loss of engine power (total)
Weather
Visual (VMC) · Day
Status
Completed · report August 12, 2010
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration
FAA report
20100516005169A
Case key
76028

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 loss of engine power due to a fuse failure in the ignition 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.

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

While cruising at 2,900 feet above ground level, the pilot advanced the throttle and heard a "pop" from the engine, which then lost total power before the propeller stopped. The pilot's engine restart was unsuccessful, and he attempted to land at the nearest airport. The airplane landed short of the runway in a muddy field. During the landing, the nose landing gear collapsed and the airplane nosed over, resulting in damage to the vertical stabilizer and rudder. Examination of the airframe and engine revealed that a 7.5 amp ignition fuse, located in the empennage of the airplane, had failed during the flight, which resulted in the loss of ignition and the inability to restart the engine.

Factual narrative

On May 16, 2010, at 1115 central daylight time, a Dearmond RV-6A single-engine experimental airplane, N1257E, sustained substantial damage during a forced landing following a loss of engine power near Sheboygan, Wisconsin. The private pilot, who was the sole occupant and registered owner, was not injured. Visual meteorological conditions prevailed and no flight plan was filed for the Title 14 Code of Federal Regulations Part 91 personal flight. The local flight departed Manitowoc, Wisconsin, at 1020. According to the pilot, while cruising at 2,900 feet above ground level (agl), he advanced the throttle and heard a "pop" from the engine. The engine lost total power and the propeller stopped. The pilot's engine restart was unsuccessful, and he attempted to land at the nearest airport. The airplane landed short of the airport runway in a muddy field. During the landing, the nose landing gear collapsed and the airplane nosed over. Examination of the airplane by the pilot and Federal Aviation Administration inspectors revealed the vertical stabilizer and rudder were bent. Detailed examination of the airframe and engine revealed that a 7.5 amp ignition fuse, located in the empennage of the airplane, had failed during the flight, which resulted in the loss of ignition and the inability to restart the engine. The pilot stated that he was unaware of this fuse in the ignition system. The airplane's most recent conditional inspection was completed on June 28, 2009, and the airplane had accumulated 330.8 total hours at the time of the accident. The pilot's medical certificate was expired and his flight review was not current.

Aircraft

Registration
N1257E
Reported as
Dearmond Clint RV-6A
Category
Airplane, amateur-built
Serial number
60369
Airframe hours
330.8
Engine
Chevrolet, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Wunsch Donald L
Registered owner
Wunsch Donald L
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · June 28, 2009
Departed
MTW · Manitowoc, WI
Destination
MTW · Manitowoc, WI

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
53
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Last flight review
May 3, 2003
Seat
Left
Flight hours
270 total · 42 in this make and model · 228 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
70° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None

Docket · 2

The files NTSB released with the investigation on July 9, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 383 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.