Accident Sikorsky S-76A N760P, Monday 27 March 1989

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Date:	Monday 27 March 1989
Time:	17:55 LT
Type:	Sikorsky S-76A
Owner/operator:	International Business Machine
Registration:	N760P
MSN:	760074
Year of manufacture:	1980
Total airframe hrs:	2287 hours
Engine model:	Allison 250-C305
Fatalities:	Fatalities: 0 / Occupants: 2
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Manhattan, NY - United States of America
Phase:	Landing
Nature:	Executive
Departure airport:	Teterboro, NJ (KTEB)
Destination airport:
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:

Probable Cause: THE PILOT MISJUDGED CLEARANCE BETWEEN HIS AND THE OTHER HELICOPTER. FACTORS RELATED TO THE ACCIDENT WERE: INADEQUATE LAYOUT (MARKINGS) OF THE HELIPORT PARKING AREA, INSUFFICIENT STANDARD/REQUIREMENT FOR NUMERICAL INDICATION OF MAXIMUM ROTOR DIAMETER ACCOMMODATIONS AT HELICOPTER PARKING FACILITIES, FAILURE OF THE UNICOM OPERATOR TO ADVISE THE PILOTS OF PARKING SPOTS THAT WERE DESIGNATED FOR LARGER (S-76) HELICOPTERS, AND PROXIMITY OF THE OTHER HELICOPTER.

Accident investigation: