Aircraft Accident/Incident Report

Blanchard, Idaho 83804
Saturday, September 6, 2003 13:40 PDT

NTSB Narrative Summary Released at Completion of Accident

The pilot reported that while climbing there was a loud bang and simultaneously a spray of oil across the front windscreen. Several seconds later smoke began to develop within the cockpit and the pilot secured the engine and executed an off airport landing. The aircraft encountered rough, deeply furrowed terrain on rollout during which the landing gear collapsed. Post crash examination of the aircraft's engine revealed that the three-quarter inch hex head plug at the front of the engine, which retains the propeller governor idler gear shaft, had backed out of its threaded insert. The plug, which was found in the bottom of the engine had no safety wire attached and no safety wire was observed on the tie down point on the engine. The propeller governor idler gear shaft setscrew was loose and the gear shaft itself was missing. With the hex head plug and propeller governor idler gear shaft released, engine oil, under pressure could exit the engine. The engine had been overhauled 248.2 hours prior to the accident and then subsequently repaired for a propeller strike. It could not be determined whether any action related to the safety wiring of the hex plug or any adjustment to the set screw had been conducted at the overhaul or prop strike repair.

NTSB Probable Cause Narrative

The loss of engine oil as a result of the inadequate installation of the idler gear shaft set screw and the lack of a safety wire on the hex head (oil) plug. A contributing factor was the rough and uneven terrain.

Event Information

Type of Event Accident
Event Date 9/6/2003
Event Day of the Week Saturday
Time of Event 1340
Event Time Zone Pacific Daylight Time
Event City Blanchard
Event State IDAHO
Event Country --
Zipcode of the event site 83804
Event Date Year 2003
Event Date Month 9
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 480023N
Event Location Longitude 1165628W
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 Not pertinent
Investigator's weather source Weather Observation Facility
Time of the weather observation 1335 Pacific Daylight Time
Direction of event from weather observation facility (degrees) 142
Weather Observation Facility ID COE
Elevation of weather observation facility 2318
Distance of event from weather observation facility (units?) 13
Time Zone of the weather observation PDT
Lighting Conditions Day
Lowest Ceiling Height --
Lowest Non-Ceiling Height --
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 32
Dew Point at event time (in degress fahrenheit) 3
Wind Direction (degrees magnetic) 140
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 3
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 29.89
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor --
Injury Total None 2
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 15590
NTSB Notification Source SEA FAA ROC
NTSB Notification Date Sep 6 2003 12:00AM
NTSB Notification Time 1428
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record Jun 3 2004 1:28PM
User who most recently changed record NTSB\MONR
Basic weather conditions Visual Meteorological Cond
FAA District Office Spokane FSDO

Aircraft Involved

Aircraft #1

Aircraft Registration Number N6368R
NTSB Number SEA03LA187
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? No
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name Cessna
Aircraft Model 172RG
Aircraft Series Identifier --
Aircraft Serial Number 172RG0171
Certified Max Gross Weight 2650
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 4
Number of Engines 1
Fixed gear or retractable gear Retractable
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Dec 17 2002 12:00AM
Airframe hours since last inspection 79
Airframe Hours 5300
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name Heart Truss & Eng Inc.
Aircraft Owner Street Address --
Aircraft Owner City Green Acres
Aircraft Owner State WA
Aircraft Owner Country USA
Aircraft Owner Zipcode 99016
Operator is an individual? No
Operator Name Pierce, David A.
Operator Same as Owner? No
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 Yes
Departure Point Same as Event No
Departure Airport Code SFF
Departure City Spokane
Departure State WA
Departure Country USA
Departure Time 1315
Departure Time Zone PDT
Destination Same as Local Flt --
Destination Airport Code 65S
Destination City Bonners Ferry
Destination State ID
Destination Country USA
Specific Phase of Flight Landing
Report sent to ICAO? No
Evacuation occurred No
Date of most recent change to record Mar 25 2004 2:43PM
User who most recently changed record STAM
Since inspection or accident Time of Accident
Event Location Runway Number and Location NA
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --