ASN Wikibase Occurrence # 38782
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| Date: | Saturday 10 September 1994 |
| Time: | 14:26 LT |
| Type: |  Cessna 175 Skylark |
| Owner/operator: | Rigsby, Russell M. |
| Registration: | N7554M |
| MSN: | 55854 |
| Engine model: | CONTINENTAL GO-300-C |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Oklahoma City, OK -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | (2DT) |
| (2DT) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
WITNESSES REPORTED THAT DURING THE TAKEOFF INITIAL CLIMB, ENGINE SOUNDS CEASED AND THE PROPELLER STOPPED IN A VERTICAL POSITION. THE AIRPLANE TOUCHED DOWN ON A GRASSY AREA BEYOND THE DEPARTURE END OF THE RUNWAY; AFTER TRAVERSING ROUGH AND UNEVEN TERRAIN, IT ENCOUNTERED A DIRT BANK AND BECAME AIRBORNE. THE AIRPLANE THEN DESCENDED INTO A 25' DEEP RAVINE. AN EXAMINATION REVEALED THE ENGINE WAS BINDING DURING ROTATION AND THE FRONT REDUCTION GEAR CASE WAS REMOVED. THE PROPELLER SHAFT THRUST BEARINGS FIT LOOSELY ABOUT THE JOURNAL, EXHIBITED SCRATCHES, AND WERE NOT THE CORRECT BEARINGS. BOTH THE PROPELLER DRIVER GEAR FRONT BEARING AND REAR BEARING WERE SOLID BRASS BEARINGS. THE MANUFACTURER PRINT SPECIFICATIONS FOR THESE BEARINGS LISTED A STEEL BACKED SPLIT BEARING. THE FRONT BEARING WAS SEIZED TO THE PROPELLER DRIVE GEAR. THE CRANKCASE AND THE FORWARD GEAR CASE EXHIBITED GALLING AND METAL DEBRIS, WHICH WAS IDENTIFIED AS ALUMINUM FROM THE MAIN GEAR CASE. THE ENGINE MAIN BEARINGS AND ROD BEARINGS EXHIBITED SCRATCHES.
Probable Cause: IMPROPER MAINTENANCE OF THE ENGINE BY UNKNOWN PERSON(S), THE INSTALLATION OF UNAPPROVED PARTS, AND SUBSEQUENT BEARING SEIZURE. THE LACK OF SUITABLE TERRAIN IN THE FORCED LANDING AREA WAS A RELATED FACTOR.
Accident investigation:
 |
|
Sources:
NTSB FTW94FA295
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 09-Apr-2024 19:22 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Phase, Destination airport, Source, Narrative, Category, Accident report] |
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