DEN07CA019

NTSB accident investigation · Luscombe 8F · Wellsville, KS · November 5, 2006

Accident · No injuriesData collectionFinal report
Date
November 5, 2006, 11:00 local (17:00 UTC)
Place
Wellsville, KS
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N26324Luscombe 8F
Weather
Visual (VMC) · Day
Status
Completed · report February 26, 2007
Report
Approved by Office Director
Parties
FAA Flight Standards District Office
FAA report
20061105022949A
Case key
64819

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 the ingestion of the number 2 intake valve into its cylinder. Contributing factors included the pilot allowing the airspeed and altitude to drop, making a safe landing not possible.

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/malfCruise - normal
Engine assembly,valve,intake - ingestedCause
Forced landingDescent - emergency
In flight collision with objectEmergency landing
Airspeed - lowPilot in commandFactor
Altitude - lowPilot in commandFactor
Object - tree(s)

Analysis

The pilot said the engine made a loud "bang" approximately 10 minutes into the flight and lost power. The airplane was vibrating, so the pilot secured the engine and shut off the fuel supply. The pilot declared an emergency, then attempted to land in a bean field. The airplane had "insufficient speed and altitude" to clear a tree line and struck the trees. Engine disassembly revealed the number 2 intake valve had been completely "swallowed" into the cylinder. The engine had accrued 1,700.49 hours since overhaul. The rated time-between-overhaul for the Continental C-90-12F engine is 1,800 hours.

Factual narrative

On November 5, 2006, approximately 1100 central standard time, a Luscombe 8F, N26324, piloted by a private pilot, was substantially damaged when the it struck trees and impacted terrain following a loss of power during landing approach to a field in Wellsville, Kansas. Visual meteorological conditions prevailed at the time of the accident. The personal flight was being conducted under the provisions of Title 14 CFR Part 91 without a flight plan. The pilot, the sole occupant aboard, was not injured. The cross-country flight originated from Ottawa, Kansas, approximately 1030, and was en route to Gardner Kansas.

According to a telephone interview and the pilot's accident report, the engine made a loud "bang" approximately 10 minutes into the flight and lost power. The airplane was vibrating, so the pilot secured the engine. The pilot declared an emergency, then attempted to land in a bean field. The airplane had "insufficient speed and altitude" to clear a tree line and struck the trees. Both wings were extensively damaged and the fuselage was crumpled.

An FAA inspector responded to the accident site and reported the engine oil "at a normal level." Examination of the maintenance records revealed the following:

Last annual inspection: November 9, 2005

Current tachometer time: 2,066.12 hours

Aircraft total time: 17,731.9 hours

Time since overhaul (TSO): 1,700.49 hours

Overhaul date: Unknown

Rated overhaul time: 1,800 hours

Engine disassembly revealed the number 2 intake valve had been completely "swallowed" into the cylinder. The engine had accrued 1,700.49 hours since overhaul. The rated time-between-overhaul for the Continental C-90-12F engine is 1,800 hours.

Aircraft

Registration
N26324
Reported as
Luscombe 8F
Category
Airplane
Serial number
6728
Airframe hours
17,732
Engine
Continental C-90-12F, 90 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Michael W. Dann
Airworthiness certificate
Standard, Normal
Last inspection
Annual · November 1, 2005 · 29 hours before
Departed
OWI · Ottawa, KS
Destination
K34 · Gardner, KS

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
56
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Last flight review
July 1, 2006
Seat
Left
Flight hours
465 total · 32 in this make and model · 403 as pilot in command · 27 in the last 90 days · 8 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 9 knots
Visibility
9 statute miles
Temperature
55 °F, dew point 46 °F
Altimeter
30.19 inHg
Observed at
IXD

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.