Individually Owned: 150,657
Corporate Owned: 137,281
Tulsa Int. Airport
Aircraft Accident/Incident Report
Tulsa, Oklahoma 74115
Friday, April 27, 1990 9:27 CDT
NTSB Narrative Summary Released at Completion of Accident
WHILE ON FINAL, THE ENGINE QUIT WITHOUT WARNING AND THE PILOT WAS FORCED TO EXECUTE A FORCED LANDING INTO A HEAVILY WOODED BIRD SANCTUARY. EXAMINATION OF THE ENGINE REVEALED THAT THE CRANKSHAFT GEAR ATTACHMENT BOLT WAS LOOSE WITH 0.196 INCHES OF PLAY AND THE DOWEL PIN WAS SHEARED. GEAR INSTALLATION INSTRUCTIONS CALLED FOR THE GEAR TO BE SEATED WITH A DRIFT AND HAMMER WITH NO MORE THAN 0.001 INCHES OF CLEARANCE. OTHERWISE, THE DOWEL PIN WOULD BE OFFSET AND WORK. BOTH THE BOLT AND THE DOWEL PIN SHOWED EVIDENCE OF WORKING. SHEARING OF THE CRANKSHAFT DOWEL PIN WOULD HAVE RELEASED THE GEAR TO ROTATE ABOUT THE BOLT, THUS DISCONNECTING THE GEAR AND THE IDLER GEARS WHICH TRANSMITTED TORQUE TO THE MAGNETOS. SECONDARY DAMAGE WAS OBSERVED IN THE LEFT MAGNETO. MAINTENANCE RECORDS INDICATED THAT THE ENGINE HAD BEEN OVERHAULED 88.7 HOURS PRIOR TO THE ACCIDENT.
NTSB Probable Cause Narrative
AN ENGINE FAILURE DUE TO A DISCONNECT IN THE MAGNETO DRIVE TRAIN CAUSED BY THE CRANKSHAFT GEAR NOT BEING PROPERLY INSTALLED AND SECURED DURING A RECENT ENGINE OVERHAUL.
Event Information
| Type of Event | Accident |
| Event Date | 4/27/1990 |
| Event Day of the Week | Friday |
| Time of Event | 927 |
| Event Time Zone | Central Daylight Time |
| Event City | TULSA |
| Event State | OKLAHOMA |
| Event Country | -- |
| Zipcode of the event site | 74115 |
| Event Date Year | 1990 |
| Event Date Month | 4 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | TULSA INT. |
| Event Location Nearest Airport ID | TWL |
| 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 | 640 |
| Weather Briefing Completeness | Not pertinent |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 938 Central Daylight Time |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | TUL |
| Elevation of weather observation facility | 640 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | CDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 2000 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | Broken |
| 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) | 18 |
| Dew Point at event time (in degress fahrenheit) | 15 |
| Wind Direction (degrees magnetic) | 180 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 8 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 29 |
| Density Altitude (feet) | 0 |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | Minor |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | 1 |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 1051 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Apr 27 1990 12:00AM |
| NTSB Notification Time | 1125 |
| Fiche Number and/or location -used to find docket information | 42270 |
| Date of most recent change to record | Dec 12 2000 4:54PM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N7732J |
| NTSB Number | FTW90LA102 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 135: Air Taxi & Commuter |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | -- |
| Damage | Destroyed |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | PIPER |
| Aircraft Model | PA-32-260 |
| Aircraft Series Identifier | PA-32-260 |
| Aircraft Serial Number | 32-1135 |
| Certified Max Gross Weight | 3400 |
| 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 | 6 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | AAIP |
| Date of Last Inspection | Apr 23 1990 12:00AM |
| Airframe hours since last inspection | 18 |
| Airframe Hours | 6106 |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | GALHOUN, JOHN L |
| Aircraft Owner Street Address | 2207 CUSTER PARKWAY |
| Aircraft Owner City | RICHARDSON |
| Aircraft Owner State | TX |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 75080 |
| Operator is an individual? | -- |
| Operator Name | MARTINAIRE |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | 2850 BURBANK |
| Operator City | DALLAS |
| Operator State | TX |
| Operator Country | |
| Operator Zip code | 75235 |
| Operator Code | GPMA |
| Owner has at least one certificate | Yes - certificate holder |
| 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 | Non-scheduled |
| Indicates Domestic or International Flight | Domestic |
| Operator carrying Pax/Cargo/Mail | Cargo |
| Type of Flying (Per_Bus / Primary) | Unknown |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | DAL |
| Departure City | DALLAS |
| Departure State | TX |
| Departure Country | |
| Departure Time | 740 |
| Departure Time Zone | CDT |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | |
| 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 | 17R |
| Runway Length | 6101 |
| Runway Width | 150 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |