Accident Brantly Helicopter B-2 N511R, Monday 18 February 1985

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Date:	Monday 18 February 1985
Time:	11:00 LT
Type:	Brantly Helicopter B-2
Owner/operator:	Private
Registration:	N511R
MSN:	14
Total airframe hrs:	727 hours
Engine model:	Lycoming VO-360-A1A
Fatalities:	Fatalities: 0 / Occupants: 2
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Huntingburg, IN - United States of America
Phase:	Taxi
Nature:	Training
Departure airport:
Destination airport:
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
THE ACFT EXPERIENCED A PARTIAL POWER LOSS AND MADE A HARD AUTOROTATIVE LNDG DURING A TRAINING FLT. INVESTIGATION OF THE ENG REVEALED MISTIMING OF THE LEFT MAG. THE ENG DURING TESTS ALSO RAN HOT UNTIL THE ADDITION OF A COOLING SHROUD. THE OTHER SIGNIFICANT FINDING IN THE ENG WAS THE OUT OF PROPER CLEARENCE SETTING OF THE #1 INTAKE VALUE. THE CYLINDERS HAD LESS THAN 2 HRS RUNNING TIME SINCE INSTALLATION SO THEY WERE NOT YET'SEATED IN'. THE PISTON PINS AND CAPS WERE WORN AND APPARENTLY NOT REPLACED DURING THE NEW CYLINDER INSTALATION. ;

Probable Cause:

Accident investigation: