Aircraft Accident/Incident Report

Piru, California 93040
Wednesday, July 2, 2008 13:10 PDT

NTSB Narrative Summary Released at Completion of Accident

The pilot was performing a pipeline patrol flight and was maneuvering the airplane at low altitude along an expansive dry riverbed that was in a canyon that was on average about 1-mile wide. The pipeline was buried on the south bank of the river, just below a hillside that defined the southern boundary of the canyon. While following the pipeline the pilot came across an area of recent construction digging that had exposed the pipeline. A witness observed the airplane at a slow airspeed and low altitude near the site of the digging when the left wing suddenly dropped and the airplane dove straight down into a small ravine below. The airplane came to rest about 460 feet from the base of a mountain range that comprised the south wall of a 7,500-foot-wide canyon. No evidence of mechanical malfunction or failure was found during a postaccident examination of the airplane and engine.

NTSB Probable Cause Narrative

The pilot's failure to maintain adequate airspeed while maneuvering at low altitude, which resulted in an aerodynamic stall.

Event Information

Type of Event Accident
Event Date 7/2/2008
Event Day of the Week Wednesday
Time of Event 1310
Event Time Zone Pacific Daylight Time
Event City Piru
Event State CALIFORNIA
Event Country --
Zipcode of the event site 93040
Event Date Year 2008
Event Date Month 7
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 342303N
Event Location Longitude 1184851W
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 25
Degrees magnetic from airport --
Airport Elevation 1003
Weather Briefing Completeness --
Investigator's weather source Weather Observation Facility
Time of the weather observation 1247 Pacific Standard Time
Direction of event from weather observation facility (degrees) 105
Weather Observation Facility ID WHP
Elevation of weather observation facility 1003
Distance of event from weather observation facility (units?) 25
Time Zone of the weather observation PST
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) 20
Air Temperature at event time (in degrees celsius) 32
Dew Point at event time (in degress fahrenheit) 13
Wind Direction (degrees magnetic) 100
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 7
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 29.83
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report --
Event Highest Injury Fatal
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal 1
Injury Total Minor --
Injury Total None --
Injury Total Serious --
Injury Total All 1
Investigating Agency NTSB
NTSB Docket Number (internal use) 25163
NTSB Notification Source FAA
NTSB Notification Date Jul 2 2008 12:00AM
NTSB Notification Time --
Fiche Number and/or location -used to find docket information --
Date of most recent change to record Mar 6 2009 4:56PM
User who most recently changed record coos
Basic weather conditions Visual Meteorological Cond
FAA District Office WP-VNY-FSDO

Aircraft Involved

Aircraft #1

Aircraft Registration Number N25490
NTSB Number LAX08LA211
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? No
Damage Destroyed
Aircraft Fire Ground
Aircraft Explosion None
Aircraft Manufacturer's Full Name CESSNA
Aircraft Model 152
Aircraft Series Identifier --
Aircraft Serial Number 15280690
Certified Max Gross Weight 1670
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 2
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Unknown
Date of Last Inspection --
Airframe hours since last inspection --
Airframe Hours --
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name Charles Hansen
Aircraft Owner Street Address --
Aircraft Owner City Bakersfield
Aircraft Owner State CA
Aircraft Owner Country USA
Aircraft Owner Zipcode 93309
Operator is an individual? No
Operator Name Raw Power Aviation
Operator Same as Owner? No
Operator Is Doing Business As --
Operator Address Same as Owner? No
Operator Street Address --
Operator City Los Angeles
Operator State CA
Operator Country USA
Operator Zip code 91331
Operator Code --
Owner has at least one certificate None
Other Operator of large aircraft? No
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) Aerial Observation
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code WHP
Departure City Los Angeles
Departure State CA
Departure Country USA
Departure Time 1235
Departure Time Zone PDT
Destination Same as Local Flt dest & departure same, accident can occur anywhere
Destination Airport Code --
Destination City --
Destination State --
Destination Country USA
Specific Phase of Flight Maneuvering
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Mar 6 2009 4:54PM
User who most recently changed record coos
Since inspection or accident --
Event Location Runway Number and Location N/A
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --