Individually Owned: 150,657
Corporate Owned: 137,281
Pine Mountain Lake Airport
Aircraft Accident/Incident Report
Groveland, California 95321
Friday, February 19, 2010 19:17 PST
NTSB Narrative Summary Released at Completion of Accident
The instrument-rated pilot departed at night without obtaining a weather briefing or filing an instrument flight plan. Radar track data revealed no deviations of heading or altitude for the en route segment, indicative of consistent autopilot usage. For a portion of the flight, the pilot was in communication with air traffic control (ATC) and was receiving flight following. As he approached the airport he reported to ATC that the airport was not in sight and that he would return if it was covered in a fog layer. The radar data indicated that the airplane continued to overfly the runway and begin a series of rapid altitude and heading changes. Multiple witnesses reported hearing an airplane flying with high engine speeds in the vicinity of the airport subsequent to its collision with the ground.
The wreckage path, instrument indications, and damage to surrounding trees were indicative of a high-speed, 80-degree-right-bank, and 45-degree-nose-down collision with terrain. The pilot, having flown only two instrument approaches in the preceding 6 months, was not current to fly an instrument approach. He had limited experience landing at the accident airport at night and had never performed an instrument approach into the airport in actual instrument meteorological conditions (IMC). The airplane was equipped with an autopilot and instruments suitable for flight in IMC. Impact damage and postaccident fire prevented a determination of the operational status of these systems. Examination of the remaining wreckage revealed no evidence of premishap or mechanical malfunctions of the engine and airframe.
An hour prior to the accident, another pilot reported performing a missed approach at the arrival airport due to limited visibility, followed by a diversion to an alternate airport. Witnesses and en route weather reporting facilities reported low clouds, fog, and precipitation in the vicinity of the airport. The weather conditions and operation at night were conducive to the onset of pilot spatial disorientation as indicated by the airplane's multiple rapid descents, ascents, and heading changes after the airplane passed over the airport.
NTSB Probable Cause Narrative
The pilot's continued flight into night instrument meteorological conditions during the landing approach, which resulted in an in-flight loss of aircraft control due to spatial disorientation.
Event Information
| Type of Event | Accident |
| Event Date | 2/19/2010 |
| Event Day of the Week | Friday |
| Time of Event | 1917 |
| Event Time Zone | Pacific Standard Time |
| Event City | Groveland |
| Event State | CALIFORNIA |
| Event Country | -- |
| Zipcode of the event site | 95321 |
| Event Date Year | 2010 |
| Event Date Month | 2 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 375149n |
| Event Location Longitude | 1201018w |
| Event Location Airport | Pine Mountain Lake Airport |
| Event Location Nearest Airport ID | E45 |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | 1 |
| Degrees magnetic from airport | -- |
| Airport Elevation | 2930 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1845 Pacific Standard Time |
| Direction of event from weather observation facility (degrees) | 310 |
| Weather Observation Facility ID | 022 |
| Elevation of weather observation facility | 2118 |
| Distance of event from weather observation facility (units?) | 16 |
| Time Zone of the weather observation | PST |
| Lighting Conditions | Night |
| Lowest Ceiling Height | 300 |
| Lowest Non-Ceiling Height | -- |
| Sky/Lowest/Cloud Conditions | -- |
| Sky Condition for Lowest Ceiling | Overcast |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 1 |
| Air Temperature at event time (in degrees celsius) | 9 |
| Dew Point at event time (in degress fahrenheit) | 8 |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | -- |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | Calm |
| Wind Gust Indicator | -- |
| 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 | 2 |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 2 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 27852 |
| NTSB Notification Source | FAA Comm Center |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Dec 17 2010 4:03PM |
| User who most recently changed record | coos |
| Basic weather conditions | Instrument Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N4175A |
| NTSB Number | WPR10FA142 |
| 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-32R-301T |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 3257193 |
| 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 | 7 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | May 9 2009 12:00AM |
| Airframe hours since last inspection | 90 |
| Airframe Hours | 1310 |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | No |
| ELT Type | C126 |
| Aircraft Owner Name | N4175A LLC |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | WILMINGTON |
| Aircraft Owner State | DE |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 19808-1645 |
| Operator is an individual? | Yes |
| Operator Name | Albert P Halluin |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | -- |
| Operator City | Groveland |
| Operator State | CA |
| Operator Country | USA |
| Operator Zip code | 95321 |
| 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) | Personal |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | SQL |
| Departure City | San Carlos |
| Departure State | CA |
| Departure Country | USA |
| Departure Time | 1825 |
| Departure Time Zone | PST |
| Destination Same as Local Flt | -- |
| Destination Airport Code | E45 |
| Destination City | Groveland |
| Destination State | CA |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Dec 17 2010 4:03PM |
| User who most recently changed record | coos |
| Since inspection or accident | Last Inspection |
| Event Location Runway Number and Location | 09 |
| Runway Length | 3624 |
| Runway Width | 50 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |