ASN Wikibase Occurrence # 372580
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| Date: | Thursday 23 July 1987 |
| Time: | 06:45 LT |
| Type: |  Hiller UH-12E |
| Owner/operator: | Tri Rotor Spray |
| Registration: | N67139 |
| MSN: | 1623 |
| Total airframe hrs: | 1845 hours |
| Engine model: | LYCOMING O-540 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Ulysess, KS -
 United States of America
|
| Phase: | En route |
| Nature: | Agricultural |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING A HELICOPTER AERIAL APPLICATION OPERATION, ACFT SUFFERED A MAIN ROTOR SYSTEM HUB FAILURE. PIC WAS UNABLE TO CONTROL THE ACFT AND AN UNCONTROLLED DESCENT RESULTED. ACFT STRUCK THE TERRAIN AND WAS SUBSTANTIALLY DAMAGED AND THE PIC SUFFERED MINOR INJURIES. PIC STATED THAT THE COMPLETE ROTOR HEAD, BLADES AND PADDLES, HAD JUST BEEN REINSTALLED, AND AFTER A FLIGHT OF LESS THAN ONE MILE, THE FAILURE OCCURRED. PIC FURTHER STATED THAT THE LINKAGE PIN THAT GOES THROUGH THE MAST AND PITCH CHANGE MECHANISM WAS NOT ALIGNED CAUSING THE FAILURE.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB MKC87LA145
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 26-Mar-2024 18:33 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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