ASN Wikibase Occurrence # 358736
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| Date: | Monday 3 July 1995 |
| Time: | 11:45 LT |
| Type: |  Hiller UH-12C |
| Owner/operator: | Whirlybirds Inc |
| Registration: | N1348Z |
| MSN: | 1043 |
| Year of manufacture: | 1958 |
| Total airframe hrs: | 3583 hours |
| Engine model: | Franklin 6V4 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Rio Vista, CA -
 United States of America
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | (O88) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE INSTRUCTOR WAS PERFORMING A LOW RPM RECOVERY WHEN THE AIRCRAFT BEGAN AN UNCOMMANDED YAW TO THE RIGHT. HE ATTEMPTED TO CONTROL THE AIRCRAFT BY APPLYING FULL LEFT ANTI-TORQUE PEDAL, BUT IT HAD NO EFFECT ON THE YAW. HE LOWERED COLLECTIVE AND THE AIRCRAFT TOUCHED DOWN HARD, REBOUNDED, AND CONTINUED TO YAW RIGHT. HE APPLIED LEFT CYCLIC AND ROLLED OFF THE THROTTLE AND TOUCHED DOWN AGAIN. AN INSPECTION REVEALED THAT THE LEFT ANTI-TORQUE CONTROL CABLE HAD SEPARATED. A LABORATORY EXAMINATION REVEALED THAT FAILURE WAS DUE TO SEVERE WEAR. THE CABLE HAD CHAFED NEAR THE BOTTOM OF THE STARTER. THE CABLE WAS IN AN AREA THAT COULD BE INSPECTED DURING A PREFLIGHT INSPECTION OF THE AIRCRAFT.
Probable Cause: The result of a chafing failure of the left anti-torque control cable while the aircraft was in flight. An inadequate preflight inspection by the pilot-in-command, and an inadequate 100-hour inspection by company maintenance personnel were factors in this accident.
Accident investigation:
 |
|
Sources:
NTSB LAX95LA238
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 14-Mar-2024 17:40 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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