Date:	Tuesday 11 April 1989
Time:	10:31
Type:	Sikorsky S-58ET
Owner/operator:	Midwest Helicopters
Registration:	N4247U
MSN:	58-1537
Total airframe hrs:	4326 hours
Engine model:	P&W PT6T-6
Fatalities:	Fatalities: 0 / Occupants: 1
Other fatalities:	0
Aircraft damage:	Substantial, repaired
Category:	Accident
Location:	Milwaukee, WI -   United States of America
Phase:	Manoeuvring (airshow, firefighting, ag.ops.)
Nature:	External load operation
Departure airport:	Milwaukee, WI (MKE)
Destination airport:
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
Crashed during logging operation due to disconnect of the tail rotor drive shaft coupling; pilot seriously injured.

The accident helicopter descended into sloping terrain and rolled over while performing external load operations. The helicopter had just picked up a load and was moving laterally when it sustained a loss of anti-torque control and the fuselage started an uncommanded and uncontrolled rotation to the right. The PIC was able to jettison his external load into a clear area and move the helicopter away from obstructions before initiating an out of ground effect hovering autorotation.

NTSB

ex H-34G-III 80+67 Heeresflieger (German Army).

Other occurrences involving this aircraft


27 November 2022

HL9678

TransHeli Corporation

5

Eoseongjeon-ri, Hyeonbuk-myeon, Yangyang-gun, Gangwon-do

w/o

Date/time	Contributor	Updates
23-Mar-2011 17:31	TB	Added
21-Dec-2016 19:25	ASN Update Bot	Updated [Time, Damage, Category, Investigating agency, ]
20-Dec-2024 09:06	ASN	Updated [Source, Narrative, Category, Accident report, ]
20-Dec-2024 09:09	ASN	Updated [Departure airport, Source, Embed code, Narrative, ]