Aircraft Accident/Incident Report

Rapids, Montana 59063
Saturday, August 9, 2003 13:00 MDT

NTSB Narrative Summary Released at Completion of Accident

The pilot reported that he over flew his intended landing site, a gravel road to determine its condition and the direction of the prevailing winds. He then made a standard traffic pattern entry landing to the east. The pilot reported that the gravel road was 25 feet wide, down sloping to the east and 1,000 feet in length that was "slightly winding." During the landing roll (decelerating through about 35-40 mph), the pilot determined that the aircraft was drifting right and he began correcting for the drift. He then noticed that the right tire was deflated and rolling on the rim. The aircraft's right wheel entered a shallow ditch at the edge of the road and the aircraft then departed the landing surface and traveled over rough down sloping terrain before nosing over and coming to rest inverted. The pilot, who held a mechanic's license, reported that upon examining the right wheel following the accident he found the wheel's valve stem to be broken.

NTSB Probable Cause Narrative

The failure of the landing gear tire valve stem and the pilot's failure to maintain directional control during the landing roll. The deflation of the tire and rough/uneven terrain were factors.

Event Information

Type of Event Accident
Event Date 8/9/2003
Event Day of the Week Saturday
Time of Event 1300
Event Time Zone Mountain Daylight Time
Event City Rapids
Event State MONTANA
Event Country --
Zipcode of the event site 59063
Event Date Year 2003
Event Date Month 8
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 453642N
Event Location Longitude 1090618W
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 Unknown
Investigator's weather source Weather Observation Facility
Time of the weather observation 1256 Mountain Daylight Time
Direction of event from weather observation facility (degrees) 70
Weather Observation Facility ID BIL
Elevation of weather observation facility 3649
Distance of event from weather observation facility (units?) 26
Time Zone of the weather observation MDT
Lighting Conditions Day
Lowest Ceiling Height --
Lowest Non-Ceiling Height 7500
Sky/Lowest/Cloud Conditions Few
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) 29
Dew Point at event time (in degress fahrenheit) 11
Wind Direction (degrees magnetic) --
Variable Wind Indicator Variable
Wind Speed (knots) 4
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 30.12
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 1
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 15400
NTSB Notification Source Operator
NTSB Notification Date Aug 11 2003 12:00AM
NTSB Notification Time 1243
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record Apr 28 2004 3:34PM
User who most recently changed record NTSB\MONR
Basic weather conditions Visual Meteorological Cond
FAA District Office Helena FSDO

Aircraft Involved

Aircraft #1

Aircraft Registration Number N115HP
NTSB Number SEA03LA166
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 Piper
Aircraft Model PA-18-150
Aircraft Series Identifier --
Aircraft Serial Number 18-8910
Certified Max Gross Weight 1750
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 2
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Jan 13 2003 12:00AM
Airframe hours since last inspection 11
Airframe Hours 4489
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name Hawkins & Powers Aviation Inc.
Aircraft Owner Street Address PO BOX 391
Aircraft Owner City Greybull
Aircraft Owner State WY
Aircraft Owner Country USA
Aircraft Owner Zipcode 82426
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 BZBA
Owner has at least one certificate --
Other Operator of large aircraft? --
Certified for Part 133 or 137 Operation Agriculture
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 GEY
Departure City Greybull
Departure State WY
Departure Country USA
Departure Time 1200
Departure Time Zone MDT
Destination Same as Local Flt crash at destination city
Destination Airport Code --
Destination City Park City
Destination State MT
Destination Country USA
Specific Phase of Flight Landing - roll
Report sent to ICAO? No
Evacuation occurred No
Date of most recent change to record Mar 10 2004 8:39PM
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 --