Individually Owned: 150,657
Corporate Owned: 137,281
St Mary's Airport
Aircraft Accident/Incident Report
St Mary's, Alaska 99658
Tuesady, December 31, 1996 17:00 AST
NTSB Narrative Summary Released at Completion of Accident
The pilot and passenger were landing at the conclusion of a cross-country, state-government flight. The pilot began a straight-in approach and applied carburetor heat about 600 feet above the ground in preparation for landing. The engine began to run rough. The pilot continued with the approach, and about 300 feet above the ground, increased the throttle. The engine lost power, and the pilot performed an emergency landing off the left side of the runway. The weather conditions were clear, temperature was -2 degrees F, and dew point was -8 degrees F. The pilot reported observing visible ice crystals. After recovery of the airplane, an engine examination did not disclose any mechanical malfunction. The engine ran at idle RPM with the carburetor heat control in the 'Hot' and 'Cold' positions.
NTSB Probable Cause Narrative
the pilot's improper use of carburetor heat, and subsequent loss of engine power. Factors associated with the accident were the presence of ice crystals in the atmosphere, and unsuitable terrain for a forced landing.
Event Information
| Type of Event | Accident |
| Event Date | 12/31/1996 |
| Event Day of the Week | Tuesday |
| Time of Event | 1700 |
| Event Time Zone | Atlantic Standard Time |
| Event City | ST MARY'S |
| Event State | ALASKA |
| Event Country | -- |
| Zipcode of the event site | 99658 |
| Event Date Year | 1996 |
| Event Date Month | 12 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | ST MARY'S |
| Event Location Nearest Airport ID | KSM |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | 311 |
| Weather Briefing Completeness | Not pertinent |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1656 Atlantic Standard Time |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | PAS |
| Elevation of weather observation facility | 311 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | AST |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | None |
| 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) | -19 |
| Dew Point at event time (in degress fahrenheit) | -18 |
| Wind Direction (degrees magnetic) | 40 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 5 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 29 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 2 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 1892 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Dec 31 1996 12:00AM |
| NTSB Notification Time | 1734 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Dec 8 2000 10:29AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N7066 |
| NTSB Number | ANC97TA016 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | VFR |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Cessna |
| Aircraft Model | 180 |
| Aircraft Series Identifier | 180 |
| Aircraft Serial Number | 51304 |
| Certified Max Gross Weight | 2650 |
| 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 | Fixed |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Oct 31 1996 12:00AM |
| Airframe hours since last inspection | 16 |
| Airframe Hours | 9030 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | ALASKA STATE TROOPERS |
| Aircraft Owner Street Address | 4827 AIRCRAFT DRIVE |
| Aircraft Owner City | ANCHORAGE |
| Aircraft Owner State | AK |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 99502 |
| Operator is an individual? | -- |
| 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? | 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) | Unknown |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | BET |
| Departure City | BETHEL |
| Departure State | AK |
| Departure Country | |
| Departure Time | 1612 |
| Departure Time Zone | AST |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | KSM |
| Destination City | |
| Destination State | |
| Destination Country | |
| Specific Phase of Flight | Emergency landing |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:34AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 34 |
| Runway Length | 6000 |
| Runway Width | 150 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |