Libby Airport
Aircraft Accident/Incident Report

Libby, Montana 59923
Saturday, April 8, 2000 16:00 MDT

NTSB Narrative Summary Released at Completion of Accident

The aircraft was in a powered cruise configuration at 7,500 feet mean sea level when one of the propeller blades separated from the propeller hub. The pilot initiated a descent and subsequent forced landing without further incident or damage to the aircraft. An FAA Inspector examined the aircraft after the accident and reported that the propeller blade separated near the propeller hub. The inspector also stated that there appeared to be a preexisting crack in the area of the separation.

NTSB Probable Cause Narrative

A crack in the propeller blade that developed into a complete separation of the blade.

Event Information

Type of Event Accident
Event Date 4/8/2000
Event Day of the Week Saturday
Time of Event 1600
Event Time Zone Mountain Daylight Time
Event City LIBBY
Event State MONTANA
Event Country --
Zipcode of the event site 59923
Event Date Year 2000
Event Date Month 4
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude --
Event Location Longitude --
Event Location Airport LIBBY
Event Location Nearest Airport ID S59
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 2601
Weather Briefing Completeness Not pertinent
Investigator's weather source Pilot
Time of the weather observation 0
Direction of event from weather observation facility (degrees) 0
Weather Observation Facility ID
Elevation of weather observation facility 0
Distance of event from weather observation facility (units?) 0
Time Zone of the weather observation
Lighting Conditions Day
Lowest Ceiling Height 0
Lowest Non-Ceiling Height 0
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling Unknown
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 50
Air Temperature at event time (in degrees celsius) 7
Dew Point at event time (in degress fahrenheit) --
Wind Direction (degrees magnetic) 230
Variable Wind Indicator Unknown
Wind Speed (knots) 2
Wind Velocity Indicator Unknown
Wind Gust Indicator Unknown
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) --
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 1
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 760
NTSB Notification Source FAA ROC
NTSB Notification Date Apr 11 2000 12:00AM
NTSB Notification Time 1655
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 N54AS
NTSB Number SEA00LA068
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name PZL-Bielsko
Aircraft Model SZD-45A OGAR
Aircraft Series Identifier SZD-45A OG
Aircraft Serial Number B-769
Certified Max Gross Weight 1540
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 2
Number of Engines 1
Fixed gear or retractable gear Retractable
Aircraft, Type of Last Inspection Annual
Date of Last Inspection Apr 7 2000 12:00AM
Airframe hours since last inspection 3
Airframe Hours 200
ELT Installed Yes
ELT Activated Yes
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name JOHN J. NEILS
Aircraft Owner Street Address 3645 W. HOLISTER DR
Aircraft Owner City POST FALLS
Aircraft Owner State ID
Aircraft Owner Country
Aircraft Owner Zipcode 83854
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) Personal
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code COE
Departure City COEUR D'ALENE
Departure State ID
Departure Country
Departure Time 1200
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
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 33
Runway Length 5000
Runway Width 75
Sight Seeing flight No
Air Medical Flight No
Medical Flight --