# Accident 19890411007609A: Skrsky S58BT, Milwaukee, WI, April 11, 1989

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: April 11, 1989, 10:31 local time
- Place: Milwaukee, WI
- Damage: Substantial damage
- Phase of flight: Pwr Off Vert Land/Autorotate
- Operating rules: Rotorcraft external load (Part 133)
- Operator: JTKL
- Location: 42.9802° N, 87.9002° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=42.9802&lon=-87.9002&mi=10
- Aircraft: N4247U (not matched to a registry record)
- Reported make and model: SKRSKY S58BT
- Reported engine: PWA PT6T6
- Fatal injuries: 0
- Pilot flight hours: 9,562 total, 3,400 in this make and model, 99 in the last 90 days
- NTSB investigation: [NTSB CHI89FA071](https://openairdocs.org/ntsb/CHI89FA071) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19890411007609A

## Narrative

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

TAIL ROTOR DRIVESHAFT SEPARATED DURING LONG LINE HOVER. DROPPED LOAD AND AUTOROTATED PARTIAL CONTROL AND CRASHED.

## 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 CHI89FA071](https://openairdocs.org/ntsb/CHI89FA071), Apr 11, 1989: Sikorsky S-58T (N4247U), Milwaukee, WI, substantial damage. Probable cause: DISCONNECT OF THE TAILROTOR DRIVE SHAFT COUPLING.

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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