ASN Wikibase Occurrence # 355133
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| Date: | Sunday 12 October 1997 |
| Time: | 15:00 LT |
| Type: |  Cessna 170A |
| Owner/operator: | Private |
| Registration: | N9212A |
| MSN: | 18973 |
| Year of manufacture: | 1949 |
| Engine model: | Continental O-300 |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Quincy, CA -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Chico, CA (KCIC) |
| (201) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that the approach, landing flare, and touchdown were normal. He further stated that during the initial ground roll, a very strong tail wheel vibration began, which 'shook the plane and overrode my rudder controls.' The pilot was unable to regain control, and the aircraft veered to the left, then ground looped in a very tight circle. Written statements submitted by the passengers were consistent with the pilot's report. An FAA airworthiness inspector examined the runway and aircraft. He reported that tail wheel scrub marks were present on the runway pavement in a high frequency wave pattern which led to the point of the ground loop. Examination of the aircraft disclosed about 1/8-inch play in the tail wheel bearings. The inspector also reported that the tail wheel was improperly shimmed. Review of the maintenance records disclosed that the tail wheel was replaced 12 days before the accident. Work orders from the repair shop (that installed the unit) noted that the tail wheel assembly was supplied by the owner. The work order noted that the bearings were replaced by the shop at the time of installation.
Probable Cause: loss of directional control due to a severe tail wheel vibration, which was induced by an improperly installed and adjusted tail wheel assembly.
Accident investigation:
 |
|
Sources:
NTSB LAX98LA011
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 12-Mar-2024 08:39 | ASN Update Bot | Added |
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