Aircraft Accident/Incident Report

Tacoma, Washington 98335
Monday, May 30, 2005 20:15 PDT

NTSB Narrative Summary Released at Completion of Accident

After flying in the local area for about 20 minutes, the pilot entered the VFR traffic pattern, and after turning on base leg the aircraft's engine suddenly lost all power. He was therefore forced to execute a power-off landing in an open field, where the aircraft's nose gear encountered some soft terrain and collapsed. A post-accident inspection determined that there was sufficient uncontaminated 100LL fuel on board. During a series of test runs, the engine ran extremely rough at rpm's below 1,500, and it quit a number of times during the run. The engine smoothed out some when the fuel boost pump was turned on to the low position, and smoothed out even more when the pump was turned to the high position. The un-metered fuel pressure was measured, and although it was lower than the specification directed, it was not low enough to account for the very rough running engine. At the end of the series of test runs, the spark plugs were removed, and their white ashy color confirmed that the engine was running extremely lean. Further flow tests and inspections were performed on the fuel system components after they were removed from the aircraft, but the results of these tests did not reveal any anomalies that would be expected to cause the engine to run rough or quit while on a reduced power approach. In addition, the fuel pump was tested to ensure that there was no air leaking past the shaft seal, and the results of that test was negative. At the completion of the testing/inspection process, it could not be clearly determined what was causing the engine's fuel system to run so lean.

NTSB Probable Cause Narrative

The malfunction of the fuel injection control system, for undetermined reasons, while the aircraft was on base leg for a full-stop landing. Factors include soft terrain in the area where the pilot found it necessary to perform a forced landing.

Event Information

Type of Event Accident
Event Date 5/30/2005
Event Day of the Week Monday
Time of Event 2015
Event Time Zone Pacific Daylight Time
Event City Tacoma
Event State WASHINGTON
Event Country --
Zipcode of the event site 98335
Event Date Year 2005
Event Date Month 5
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 471601N
Event Location Longitude 1223438W
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 0.25
Degrees magnetic from airport --
Airport Elevation 292
Weather Briefing Completeness --
Investigator's weather source Pilot
Time of the weather observation
Direction of event from weather observation facility (degrees) --
Weather Observation Facility ID --
Elevation of weather observation facility --
Distance of event from weather observation facility (units?) --
Time Zone of the weather observation --
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) 16
Dew Point at event time (in degress fahrenheit) --
Wind Direction (degrees magnetic) 190
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 8
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) --
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) 18665
NTSB Notification Source FAA Operations Center
NTSB Notification Date May 30 2005 12:00AM
NTSB Notification Time --
Fiche Number and/or location -used to find docket information DMS
Date of most recent change to record Oct 27 2005 6:51AM
User who most recently changed record NTSB\JOHB
Basic weather conditions Visual Meteorological Cond
FAA District Office Seattle FSDO

Aircraft Involved

Aircraft #1

Aircraft Registration Number N9017V
NTSB Number SEA05LA110
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 Beech
Aircraft Model A-36
Aircraft Series Identifier --
Aircraft Serial Number E-274
Certified Max Gross Weight 3600
Aircraft Category Airplane
Aircraft Registration Class --
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 Jun 1 2004 12:00AM
Airframe hours since last inspection --
Airframe Hours 4500
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name Garrett N. Pettingill
Aircraft Owner Street Address --
Aircraft Owner City Lakewood
Aircraft Owner State WA
Aircraft Owner Country USA
Aircraft Owner Zipcode 98499
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 Yes
Departure Airport Code KTIW
Departure City Tacoma
Departure State WA
Departure Country USA
Departure Time 1955
Departure Time Zone PDT
Destination Same as Local Flt dest & departure same, accident can occur anywhere
Destination Airport Code KTIW
Destination City --
Destination State --
Destination Country --
Specific Phase of Flight Approach
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Sep 12 2005 1:01PM
User who most recently changed record STAM
Since inspection or accident Last Inspection
Event Location Runway Number and Location 17
Runway Length 5000
Runway Width 75
Sight Seeing flight No
Air Medical Flight No
Medical Flight --