Aircraft Accident/Incident Report

Houlton, Maine 04730
Wednesday, September 7, 1994 6:00 EDT

NTSB Narrative Summary Released at Completion of Accident

THE PILOT HAD STARTED THE INITIAL PASS OVER A FIELD, AND WAS ABOUT TO START AERIAL APPLICATION, WHEN THE ENGINE LOST POWER. ACCORDING TO THE PILOT'S STATEMENT, THE 'PLANE STARTED TO SHAKE, SPUTTER AND BACKFIRE.' THE PILOT TRIED TO LAND AT THE AIRPORT, BUT WAS UNABLE TO REACH THE RUNWAY. THE PILOT ELECTED TO LAND ON INTERSTATE HIGHWAY 95. DURING THE LANDING THE RIGHT WING STRUCK A TREE AND THE AIRPLANE THEN HIT A GUARD RAIL AND FLIPPED OVER. AN ENGINE TEST RUN REVEALED THAT THE ENGINE COULD NOT SUSTAIN A CONTINUOUS RUN. BLACK SMOKE WAS OBSERVED COMING FROM THE EXHAUST PIPES AND THE ENGINE WAS 'KICKING BACKWARDS.' MAGNETO TIMING WAS CHECKED, AND FOUND TO BE 'APPROXIMATELY 27 DEGREES BEFORE TOP DEAD CENTER.' THE MAGNETO TIMING WAS ADJUSTED, AND AGAIN THE ENGINE COULD NOT SUSTAIN A RUN. THE MAGNETO WAS REPLACED AND THE ENGINE RAN SUCCESSFULLY. FURTHER EXAMINATION OF THE MAGNETO (BENDIX D6LN-3000, P/N 10-682560-13), REVEALED CORROSION WAS PRESENT INSIDE THE HOUSING, AND ON THE ROTATING MAGNET (RIGHT SIDE) AND THE POINTS WERE ARCING.

NTSB Probable Cause Narrative

Inadequate maintenance inspection which failed to detect internal corrosion of the magneto, resulting in ignition arcing and the loss of engine power.

Event Information

Type of Event Accident
Event Date 9/7/1994
Event Day of the Week Wednesday
Time of Event 600
Event Time Zone Eastern Daylight Time
Event City HOULTON
Event State MAINE
Event Country --
Zipcode of the event site 04730
Event Date Year 1994
Event Date Month 9
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude
Event Location Longitude
Event Location Airport
Event Location Nearest Airport ID
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles 3
Degrees magnetic from airport 270
Airport Elevation --
Weather Briefing Completeness Unknown
Investigator's weather source Pilot
Time of the weather observation 0
Direction of event from weather observation facility (degrees) 0
Weather Observation Facility ID
Elevation of weather observation facility 0
Distance of event from weather observation facility (units?) 0
Time Zone of the weather observation
Lighting Conditions Dawn
Lowest Ceiling Height 0
Lowest Non-Ceiling Height 3000
Sky/Lowest/Cloud Conditions Scattered
Sky Condition for Lowest Ceiling Unknown
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 25
Air Temperature at event time (in degrees celsius) 7
Dew Point at event time (in degress fahrenheit) --
Wind Direction (degrees magnetic) 0
Variable Wind Indicator Unknown
Wind Speed (knots) 0
Wind Velocity Indicator Calm
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) --
Density Altitude (feet) --
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal --
Injury Total Minor --
Injury Total None 1
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 2033
NTSB Notification Source --
NTSB Notification Date Sep 7 1994 12:00AM
NTSB Notification Time 90
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record Dec 6 2000 12:17PM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N8810Z
NTSB Number NYC94LA170
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 137: Agricultural
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name Eagle Aircraft Co.
Aircraft Model DW-1
Aircraft Series Identifier DW-1
Aircraft Serial Number DW1-006682
Certified Max Gross Weight 5400
Aircraft Category Airplane
Aircraft Registration Class U.S. Registered/U.S. Soil
Aircraft is a homebuilt? No
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 1
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection May 12 1994 12:00AM
Airframe hours since last inspection 232
Airframe Hours 2264
ELT Installed No
ELT Activated Unknown
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name DUANE MAHEU
Aircraft Owner Street Address RR#3 BOX 5000
Aircraft Owner City HOULTON
Aircraft Owner State ME
Aircraft Owner Country
Aircraft Owner Zipcode 04730
Operator is an individual? --
Operator Name
Operator Same as Owner? No
Operator Is Doing Business As --
Operator Address Same as Owner? No
Operator Street Address
Operator City
Operator State
Operator Country
Operator Zip code
Operator Code
Owner has at least one certificate Yes - certificate holder
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation Agriculture
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not Unknown
Indicates Domestic or International Flight Unknown
Operator carrying Pax/Cargo/Mail Unknown
Type of Flying (Per_Bus / Primary) Aerial Application
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code HUL
Departure City HOULTON
Departure State ME
Departure Country
Departure Time 600
Departure Time Zone EDT
Destination Same as Local Flt dest & departure same, accident can occur anywhere
Destination Airport Code
Destination City
Destination State
Destination Country
Specific Phase of Flight Emergency landing
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Jan 2 2001 10:34AM
User who most recently changed record dbo
Since inspection or accident --
Event Location Runway Number and Location 0
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --