Aircraft Accident/Incident Report

Ferron, Utah 84523
Sunday, February 24, 2002 13:11 MST

NTSB Narrative Summary Released at Completion of Accident

Approximately 30 minutes into the flight, the engine began to "miss, backfire heavily and sputter." The number 1 cylinder temperature "shot off the gauge" with a red light warning light illuminated. The engine lost power and the airplane began to descend. The pilot made a forced landing on a highway. During the landing roll, the airplane struck a truck parked on the shoulder, shearing off its left wing. The airplane then overturned and skidded 300 feet to a halt. Engine disassembly revealed the magneto idler gear that drives the dual magneto was missing 8 teeth. Three of the teeth were displaced from the gear and exhibited signatures consistent with mechanical overload, while the remaining 5 had been ground off. The respective idler gear shaft bore(s) at the back of the crankcase and at the accessory housing were missing approximately 1/3 of their circumferential material. The fracture surface(s) exhibited signatures consistent with overload. The overload forces appeared to have been applied inboard, evidenced by the symmetrical displacement of the bore material at each end of the subject idler gear shaft.

NTSB Probable Cause Narrative

a loss of engine power due to the ingestion of foreign object(s) into the meshing of the gears, causing a malfunction of the magneto idler gear and failure of maintenance personnel to detect the signs of imminent failure during a mandatory oil filter examination to be performed at the time of an oil change, annual inspection, or engine overhaul. Contributing factors were unsuitable terrain for the forced landing, high crosswind weather conditions, and a parked vehicle in the landing area.

Event Information

Type of Event Accident
Event Date 2/24/2002
Event Day of the Week Sunday
Time of Event 1311
Event Time Zone Mountain Standard Time
Event City Ferron
Event State UTAH
Event Country --
Zipcode of the event site 84523
Event Date Year 2002
Event Date Month 2
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 --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness Full
Investigator's weather source Weather Observation Facility
Time of the weather observation 1310 Mountain Standard Time
Direction of event from weather observation facility (degrees) 20
Weather Observation Facility ID PUC
Elevation of weather observation facility 5953
Distance of event from weather observation facility (units?) 36
Time Zone of the weather observation MST
Lighting Conditions Day
Lowest Ceiling Height 6000
Lowest Non-Ceiling Height --
Sky/Lowest/Cloud Conditions Unknown
Sky Condition for Lowest Ceiling Overcast
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 7
Dew Point at event time (in degress fahrenheit) -7
Wind Direction (degrees magnetic) 290
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 14
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 30.02
Density Altitude (feet) 6370
Intensity of Precipitation --
METAR weather report --
Event Highest Injury Minor
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor 4
Injury Total None --
Injury Total Serious --
Injury Total All 4
Investigating Agency NTSB
NTSB Docket Number (internal use) 12595
NTSB Notification Source FAA COMM CTR
NTSB Notification Date Feb 24 2002 12:00AM
NTSB Notification Time 1327
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record Jan 16 2003 4:27PM
User who most recently changed record NTSB\MONR
Basic weather conditions Visual Meteorological Cond
FAA District Office Salt Lake City, Utah

Aircraft Involved

Aircraft #1

Aircraft Registration Number N47465
NTSB Number DEN02LA028
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed VFR
Flight plan Was Activated? No
Damage Destroyed
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name Piper
Aircraft Model PA-32R-300
Aircraft Series Identifier --
Aircraft Serial Number 32R-7880008
Certified Max Gross Weight 3600
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 6
Number of Engines 1
Fixed gear or retractable gear Retractable
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Oct 15 2001 12:00AM
Airframe hours since last inspection 25
Airframe Hours 3850
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name David R. Powers, Trustee
Aircraft Owner Street Address 40874 Baccarat Rd.
Aircraft Owner City Temecula
Aircraft Owner State CA
Aircraft Owner Country USA
Aircraft Owner Zipcode 92591
Operator is an individual? No
Operator Name --
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address --
Operator City --
Operator State --
Operator Country --
Operator Zip code --
Operator Code --
Owner has at least one certificate None
Other Operator of large aircraft? --
Certified for Part 133 or 137 Operation --
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not --
Indicates Domestic or International Flight --
Operator carrying Pax/Cargo/Mail --
Type of Flying (Per_Bus / Primary) Personal
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code U69
Departure City Duchesne
Departure State UT
Departure Country USA
Departure Time 1245
Departure Time Zone MST
Destination Same as Local Flt --
Destination Airport Code CDC
Destination City Cedar City
Destination State UT
Destination Country USA
Specific Phase of Flight Emergency landing
Report sent to ICAO? No
Evacuation occurred Yes
Date of most recent change to record Nov 6 2002 9:58AM
User who most recently changed record MCBM
Since inspection or accident Last Inspection
Event Location Runway Number and Location --
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --