Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Milaca, Minnesota 56353
Thursday, December 30, 2010 9:58 CST
NTSB Narrative Summary Released at Completion of Accident
About 20 minutes after departing on a cross-country flight, the pilot acknowledged the air traffic controller’s clearance to climb to 17,000 feet mean sea level (msl). Radar data indicated that the airplane reached a maximum altitude of 16,800 feet msl. The airplane then entered a right descending turn followed by a left descending turn. While in the left turn, the pilot informed the controller, “I lost my autopilot; I’m in an unusual attitude.” The pilot stated this same information two more times in response to transmissions by the controller. The pilot’s last transmission was that he was busy trying to recover the airplane. Witnesses heard the airplane flying overhead for several minutes, but they could not see it due to the low ceiling.
A postaccident examination of the airplane did not reveal any preaccident mechanical malfunctions or failures with the engine that would have precluded normal operation. Examination of the autopilot system revealed a loose screw inside the pitch servo housing. The screw was one of two that secured the high wattage resistor to the solenoid housing. Observed corrosion within the screw threads was consistent with the threads not being engaged in a nut or other internally threaded feature. No mechanical damage or arcing was visible on the screw. The operational impact of the loose screw is unknown.
The pilot’s instrument flying proficiency could not be determined. According to log records, the pilot last flew 4.5 months before the accident. The airplane was in instrument meteorological conditions when the pilot stated that he was trying to recover from the unusual attitude. The pilot did not follow prescribed procedures for an autopilot malfunction. Weather data indicates that the airplane most likely encountered turbulence and icing conditions during the flight; however, the airplane was equipped with an ice protection system. Although ethanol was found during the toxicology tests, the levels varied greatly among the tissue/fluid samples. The investigation was unable to determine if the presence of ethanol was from ingestion or from postmortem production or contamination. The detected level of diphenhydramine, an over-the-counter sedating antihistamine used to treat allergies, was above therapeutic levels and likely contributed to the pilot’s inability to recover from the unusual attitude.
NTSB Probable Cause Narrative
The pilot did not recover from an unusual attitude while operating in instrument meteorological conditions following a disconnect of the autopilot system for undetermined reasons. Contributing to the accident were the pilot’s lack of recent flight experience and impairment due to diphenhydramine.
Event Information
| Type of Event | Accident |
| Event Date | 12/30/2010 |
| Event Day of the Week | Thursday |
| Time of Event | 958 |
| Event Time Zone | Central Standard Time |
| Event City | Milaca |
| Event State | MINNESOTA |
| Event Country | -- |
| Zipcode of the event site | 56353 |
| Event Date Year | 2010 |
| Event Date Month | 12 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 454936N |
| Event Location Longitude | 0934250W |
| 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 | -- |
| Investigator's weather source | Pilot |
| Time of the weather observation | 945 Central Standard Time |
| Direction of event from weather observation facility (degrees) | 154 |
| Weather Observation Facility ID | ANE |
| Elevation of weather observation facility | 912 |
| Distance of event from weather observation facility (units?) | 48 |
| Time Zone of the weather observation | CST |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 400 |
| 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) | 4 |
| Air Temperature at event time (in degrees celsius) | 3 |
| Dew Point at event time (in degress fahrenheit) | 2 |
| Wind Direction (degrees magnetic) | 110 |
| 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) | 29.43 |
| 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) | 29698 |
| NTSB Notification Source | FAA-AGL-ROC |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Mar 5 2012 2:30PM |
| User who most recently changed record | bowl |
| Basic weather conditions | Instrument Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N9103N |
| NTSB Number | CEN11FA133 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | Yes |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | PIPER |
| Aircraft Model | PA-46-310P |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 4608021 |
| Certified Max Gross Weight | -- |
| 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 | Mar 15 2010 12:00AM |
| Airframe hours since last inspection | 27 |
| Airframe Hours | 2466 |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | TEEMARK CORP |
| Aircraft Owner Street Address | 1132 AIR PARK DR |
| Aircraft Owner City | AITKIN |
| Aircraft Owner State | MN |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 56431-5626 |
| Operator is an individual? | No |
| Operator Name | TEEMARK CORP |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | 1132 AIR PARK DR |
| Operator City | AITKIN |
| Operator State | MN |
| Operator Country | USA |
| Operator Zip code | 56431-5626 |
| 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 | AIT |
| Departure City | Aitkin |
| Departure State | MN |
| Departure Country | USA |
| Departure Time | 930 |
| Departure Time Zone | CST |
| Destination Same as Local Flt | -- |
| Destination Airport Code | BMT |
| Destination City | Beaumont |
| Destination State | TX |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 11 2012 12:30PM |
| User who most recently changed record | sulp |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | N/A |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | -- |
| Air Medical Flight | No |
| Medical Flight | -- |