# Accident 19991102043059A: Hiller UH12E, Stites, ID, November 2, 1999

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: November 2, 1999, 11:18 local time
- Place: Stites, ID
- Damage: No damage
- Operating rules: General operating rules (Part 91)
- Location: 46.0808° N, 115.9707° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=46.0808&lon=-115.9707&mi=10
- Aircraft: N5388V, a cancelled registration (https://openairdocs.org/deregistered/N5388V-2021-05-08) (OpenAirDocs)
- Registry model: Hiller UH-12E (registry code 4360122, https://openairdocs.org/model/hiller-uh-12e) (OpenAirDocs)
- Registry engine: Lycoming VO-540 series (registry code 41534, https://openairdocs.org/engine/lycoming-vo-540-series) (OpenAirDocs)
- Reported make and model: HILLER UH12E
- Fatal injuries: 0
- NTSB investigation: [NTSB SEA00TA013](https://openairdocs.org/ntsb/SEA00TA013) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19991102043059A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

(-23) PILOT REPORTED LOSS OF CONTROL OF HELICOPTER WHEN CONTROL ROTOR TUBE ASSEMBLY SEPARATED FROM HELICOPTER. HELICOPTER FELL THROUGH ELECTRICAL POWER LINES BEFORE IMPACTING TERRAIN CAUSING SUBSTANTIAL DAMAGE. PILOT AND ONE PASSENGER SUSTAINED MINOR INJURIES. SECOND PASSENGER DID NOT SUSTAIN ANY INJURIES. PRELIMINARY INSPECTION OF FAILED PART, HILLER PART NUMBER 36124, INDICATED THAT A CRACK FORMED AT THE INBOARD ATTACHMENT BOLT HOLE AND EVENTUALLY CONTINUED ALONG THE CIRCUMFERENCE OF THE PART BEFORE THE OUTER PORTION OF PART (CUFF) SEPARATED FROM THE HELICOPTER. FAILED CONTROL ROTOR ASSEMBLYHAS BEEN SENT TO THE NTSB FOR METALLURGICAL ANALYSIS.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB SEA00TA013](https://openairdocs.org/ntsb/SEA00TA013), Nov 2, 1999: Hiller UH-12E (N5388V), Stites, ID, substantial damage. Probable cause: Inadequate inspection of the control rotor cuff by a company mechanic and subsequent fatigue fracture of the cuff, resulting in an inflight separation of the control rotor blade. Factors contributing…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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