Aircraft Accident/Incident Report

June Lake, California 93529
Saturday, September 18, 1999 13:00 PDT

NTSB Narrative Summary Released at Completion of Accident

The pilot departed on a multi state cross-country flight and was reported missing when the airplane failed to arrive at the destination. The pilot originally had filed an IFR flight plan the night before his proposed departure and also obtained a weather briefing. The weather information contained in the briefing was substantially correct. He was delayed due to fog from his estimated time of departure and never refiled or opened the flight plan. CAP search aircraft located the wreckage 1 week after the accident. The aircraft was found at the 11,760-foot level of a mountain and about 1,000 feet below the peak. The site is about 2 miles south of the route of flight filed in his flight plan. Ground witnesses said there were gusty winds, heavy rain, and thunderstorms in the area the day of the crash, with clouds obscuring the mountaintop where the accident occurred. In his flight plan, the pilot had originally filed for 13,000 feet, and pilot reports during the morning and early afternoon indicated that the cloud bases were 10,000 to 12,000 feet over the mountains, with higher layers to 24,000 feet. Conditions were favorable for light to moderate clear and/or mixed icing in clouds and precipitation above 12,000 feet. No preimpact mechanical malfunctions or failures were found during examination of the airframe and engine. A review of the pilot's logbook indicated that he had 223 hours of actual instrument time and 71 hours of simulated instrument time. About 4 months preceding the accident, he had logged 3 hours.

NTSB Probable Cause Narrative

The pilot's continued VFR flight into known instrument meteorological conditions, including icing, which resulted in an in-flight collision with mountainous terrain.

Event Information

Type of Event Accident
Event Date 9/18/1999
Event Day of the Week Saturday
Time of Event 1300
Event Time Zone Pacific Daylight Time
Event City JUNE LAKE
Event State CALIFORNIA
Event Country --
Zipcode of the event site 93529
Event Date Year 1999
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 --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness Full
Investigator's weather source Weather Observation Facility
Time of the weather observation 1100 Pacific Daylight Time
Direction of event from weather observation facility (degrees) 330
Weather Observation Facility ID MMH
Elevation of weather observation facility 7128
Distance of event from weather observation facility (units?) 15
Time Zone of the weather observation PDT
Lighting Conditions Day
Lowest Ceiling Height 6500
Lowest Non-Ceiling Height 1100
Sky/Lowest/Cloud Conditions Scattered
Sky Condition for Lowest Ceiling Broken
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 10
Dew Point at event time (in degress fahrenheit) 7
Wind Direction (degrees magnetic) 0
Variable Wind Indicator Unknown
Wind Speed (knots) 0
Wind Velocity Indicator Calm
Wind Gust Indicator Not Gusting
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) 30
Density Altitude (feet) --
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury Fatal
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal 2
Injury Total Minor --
Injury Total None --
Injury Total Serious --
Injury Total All 2
Investigating Agency NTSB
NTSB Docket Number (internal use) 1840
NTSB Notification Source --
NTSB Notification Date Sep 24 1999 12:00AM
NTSB Notification Time 2114
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record May 11 2001 4:05AM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N5673P
NTSB Number LAX99FA316
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Destroyed
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name Piper
Aircraft Model PA-24-180
Aircraft Series Identifier PA-24-180
Aircraft Serial Number 24-745
Certified Max Gross Weight 2550
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 Sep 2 1998 12:00AM
Airframe hours since last inspection --
Airframe Hours --
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name CHALLENGERS INC
Aircraft Owner Street Address P. O. BOX 5957
Aircraft Owner City PETALUMA
Aircraft Owner State CA
Aircraft Owner Country
Aircraft Owner Zipcode 94955
Operator is an individual? --
Operator Name JOSEPH W. BURTON
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? 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 069
Departure City PETALUMA
Departure State CA
Departure Country
Departure Time 0
Departure Time Zone
Destination Same as Local Flt --
Destination Airport Code BCE
Destination City BRYCE CANYON
Destination State UT
Destination Country
Specific Phase of Flight --
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record May 11 2001 4:05AM
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 --