Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Cibolo, Texas 78108
Friday, July 31, 1992 10:49 CDT
NTSB Narrative Summary Released at Completion of Accident
THE COMMERCIAL PILOT HAD BEEN TROUBLESHOOTING A VIBRATION PRESENT IN HIS AIRPLANE FOR THE LAST 10 FLIGHT HOURS. AFTER THE BLADE ANGLES ON THE PROPELLER BLADES WERE REALIGNED HE FLEW THE AIRPLANE TO CHECK THE VIBRATION LEVEL. WHILE ON A LEFT DOWNWIND, THE PROPELLER SEPARATED FROM THE ENGINE AND SEVERED A WING STRUT AND PORTION OF THE LEFT WING. AFTER BOTH OF THE BIPLANE'S LEFT WINGS COLLAPSED, THE AIRPLANE ENTERED A LEFT VERTICAL SPIRAL AND IMPACTED IN AN OPEN PASTURE. SEPARATION OF THE CRANKSHAFT WAS A RESULT OF FATIGUE ORIGINATING IN THE THREADS AT A POSITION NORMALLY IN LINE WITH THE AFT FACE OF THE THRUST NUT. THE THRUST NUT ALSO FAILED IN FATIGUE. NUT CONFIGURATION WAS DIFFERENT FROM THE CONFIGURATION INDICATED IN THE ENGINEERING DRAWING. HOWEVER, IT WAS NOT ESTABLISHED IF THIS WAS A CONTRIBUTING FACTOR TO THE FAILURE. THERE WAS ALSO NO EVIDENCE OF OVER TORQUE DURING INSTALLATION.
NTSB Probable Cause Narrative
FAILURE OF THE ENGINE CRANKSHAFT DUE FATIGUE AND THE RESULTANT COLLAPSING OF THE LEFT WING.
Event Information
| Type of Event | Accident |
| Event Date | 7/31/1992 |
| Event Day of the Week | Friday |
| Time of Event | 1049 |
| Event Time Zone | Central Daylight Time |
| Event City | CIBOLO |
| Event State | TEXAS |
| Event Country | -- |
| Zipcode of the event site | 78108 |
| Event Date Year | 1992 |
| Event Date Month | 7 |
| 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 | 0 |
| Degrees magnetic from airport | 0 |
| Airport Elevation | -- |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 957 Central Daylight Time |
| Direction of event from weather observation facility (degrees) | 22 |
| Weather Observation Facility ID | RND |
| Elevation of weather observation facility | 222 |
| Distance of event from weather observation facility (units?) | 22 |
| Time Zone of the weather observation | CDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 25000 |
| Lowest Non-Ceiling Height | 2500 |
| 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) | 7 |
| Air Temperature at event time (in degrees celsius) | 28 |
| Dew Point at event time (in degress fahrenheit) | 23 |
| Wind Direction (degrees magnetic) | 190 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 9 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Unknown |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 30 |
| Density Altitude (feet) | 2000 |
| 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 | 1 |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 2451 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Jul 31 1992 12:00AM |
| NTSB Notification Time | 1220 |
| Fiche Number and/or location -used to find docket information | 47222 |
| Date of most recent change to record | Dec 11 2000 3:05PM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N62552 |
| NTSB Number | FTW92FA197 |
| 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 | BOEING |
| Aircraft Model | A75 |
| Aircraft Series Identifier | A75 |
| Aircraft Serial Number | 75-3190 |
| Certified Max Gross Weight | 2950 |
| 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 | Fixed |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | Dec 6 1991 12:00AM |
| Airframe hours since last inspection | 25 |
| Airframe Hours | 601 |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | PERDUE, HAROLD F. |
| Aircraft Owner Street Address | 7838 VILLAGE OAK DRIVE |
| Aircraft Owner City | SAN ANTONIO |
| Aircraft Owner State | TX |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 78233 |
| Operator is an individual? | -- |
| Operator Name | PERDUE, HAROLD F. |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | 7838 VILLAGE OAK DRIVE |
| Operator City | SAN ANTONIO |
| Operator State | TX |
| Operator Country | |
| Operator Zip code | 78233 |
| 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 | Yes |
| Departure Airport Code | 15R |
| Departure City | |
| Departure State | |
| Departure Country | |
| Departure Time | 1045 |
| Departure Time Zone | CDT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | 15R |
| Destination City | |
| Destination State | |
| Destination Country | |
| Specific Phase of Flight | Approach |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:35AM |
| 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 | -- |