ASN Wikibase Occurrence # 366499
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| Date: | Friday 27 July 1990 |
| Time: | 15:30 LT |
| Type: |  Robinson R22 |
| Owner/operator: | Private |
| Registration: | N9017S |
| MSN: | 0195 |
| Total airframe hrs: | 2038 hours |
| Engine model: | LYCOMING O-320 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Paducah, KY -
 United States of America
|
| Phase: | Take off |
| Nature: | Private |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE HELICOPTER IMPACTED TO THE GROUND AFTER A LOSS OF TAIL ROTOR THRUST DURING AN ATTEMPTED TAKEOFF. INVESTIGATION REVEALED THE INTERMEDIATE FLEX PLATE AND TWO CLUTCH YOKES AND FAILED. A METALLURGICAL EXAMINATION REVEALED THAT THE WASHERS IN ONE OF THE FASTENER JOINTS WERE MISPLACED. A WARNING IN THE MANUFACTURER'S MANUAL STATES: 'A559 NICKEL-PLATED RADIUSED WASHERS ARE REQUIRED ON EACH SIDE OF THE A193 FLEXPLATES OR FRETTING FAILURE MAY OCCUR WITHIN A FEW HOURS.' RECORDS INDICATE THE MOST RECENT ANNUAL INSPECTION WAS SIGNED OFF ON OCTOBER 19, 1989, AND THE AIRCRAFT HAD ACCUMULATED 119 HOURS SINCE THAT TIME. THE HELICOPTER HAD UNDERGONE A PRE-PURCHASE INSPECTION ABOUT ONE MONTH PRIOR TO THE ACCIDENT.
Probable Cause: THE LOSS OF TAIL ROTOR THRUST DUE TO IMPROPER PART INSTALLATION.
Accident investigation:
 |
|
Sources:
NTSB BFO90LA065
History of this aircraft
Other occurrences involving this aircraft
| 27 August 1993 | N9071S | Private | 0 | Bethalto, IL | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Mar-2024 09:06 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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