Aircraft Accident/Incident Report

Arco, Idaho 83213
Thursday, September 19, 1991 12:15 MDT

NTSB Narrative Summary Released at Completion of Accident

THE AIRCRAFT WAS PARKED ON A SLOPE LEFT WING LOW AND HAD BEEN EXPOSED TO RAIN PRIOR TO THE FLT. THE PLT SUMPED ALL 4 FUEL TANKS AND THEN VISUALLY DETERMINED THAT HE HAD SUFFICIENT FUEL FOR THE 1 HOUR FLT TO DESTINATION. AFTER DEPARTING ON THE RIGHT MAIN TANK AND BRIEFLY USING BOTH AUX TANKS AND APPROXIMATELY 30 MINUTES INTO THE FLT HE SWITCHED TO THE LEFT MAIN TANK AND THE ENGINE BEGAN MISSING. BELIEVING THAT HE HAD NO FUEL IN THE LEFT TANK HE SWITCHED TO THE LEFT AUX WHICH HE EXHAUSTED AND BACK TO RIGHT MAIN WHICH WAS ALSO EXHAUSTED. AFTER A TOTAL OF 55 MINUTES OF FLT AND WHILE APPROACHING HIS DESTINATION HE WAS UNABLE TO MAINTAIN POWER ON THE RIGHT AUX AND EXECUTED A FORCED LDG. DURING THE APPROACH HE DETERMINED THAT POWER LINES INTERFERED WITH HIS LANDING AND MANEUVERED TO AN ALTERNATE LDG SITE. THIS MANEUVER RESULTED IN THE PILOT'S INABILITY TO SAFELY FLARE DUE TO SINK RATE AND LOW AIRSPEED AND A HARD LDG FOLLOWED. A TOTAL OF 5 GALLONS OF FUEL WAS DRAINED FROM THE LEFT MAIN TANK SUBSEQUENT TO THE FORCED LDG.

NTSB Probable Cause Narrative

WATER IN THE FUEL TANK AND THE INABILITY OF THE PILOT TO FLARE FOR LANDING AFTER MANEUVERING TO AVOID TRANSMISSION LINES IN HIS FLIGHT PATH DURING THE FORCED LANDING.

Event Information

Type of Event Accident
Event Date 9/19/1991
Event Day of the Week Thursday
Time of Event 1215
Event Time Zone Mountain Daylight Time
Event City ARCO
Event State IDAHO
Event Country --
Zipcode of the event site 83213
Event Date Year 1991
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 0
Degrees magnetic from airport 0
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 Day
Lowest Ceiling Height 0
Lowest Non-Ceiling Height 0
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 50
Air Temperature at event time (in degrees celsius) -18
Dew Point at event time (in degress fahrenheit) -18
Wind Direction (degrees magnetic) 0
Variable Wind Indicator Unknown
Wind Speed (knots) 0
Wind Velocity Indicator Calm
Wind Gust Indicator Unknown
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) --
Density Altitude (feet) 0
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) 1344
NTSB Notification Source --
NTSB Notification Date --
NTSB Notification Time 0
Fiche Number and/or location -used to find docket information 43952
Date of most recent change to record Dec 18 2002 11:28AM
User who most recently changed record NTSB\GIUV
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N7985P
NTSB Number SEA91LA247
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name PIPER
Aircraft Model PA-24-250
Aircraft Series Identifier PA-24-250
Aircraft Serial Number 24-3223
Certified Max Gross Weight 2900
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 Unknown
Date of Last Inspection --
Airframe hours since last inspection 0
Airframe Hours --
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name ROBERT D. BOWMAN
Aircraft Owner Street Address ROUTE 1, BOX 113
Aircraft Owner City MOORE
Aircraft Owner State ID
Aircraft Owner Country
Aircraft Owner Zipcode 83255
Operator is an individual? --
Operator Name ROBERT D. BOWMAN
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address ROUTE 1, BOX 113
Operator City MOORE
Operator State ID
Operator Country
Operator Zip code 83255
Operator Code
Owner has at least one certificate None
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation Unknown
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 U81
Departure City COLD MEADOWS
Departure State ID
Departure Country
Departure Time 1120
Departure Time Zone MDT
Destination Same as Local Flt --
Destination Airport Code U57
Destination City ARCO-BUTTE
Destination State ID
Destination Country
Specific Phase of Flight Landing
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Jan 2 2001 10:35AM
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 --