NYC91LA071

NTSB accident investigation · Robinson R-22 Alpha · Coram, NY · February 2, 1991

Accident · No injuriesLimited investigationFinal report
Date
February 2, 1991, 15:37 local (20:37 UTC)
Place
Coram, NY
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N8555KRobinson R-22 Alpha
Weather
Visual (VMC) · Day
Status
Completed · report May 7, 1993
Report
Approved by Office Director
Case key
36875

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The pilot-in-command's failure to maintain rotor RPM and misjudging the height of the flare during a precautionary autorotative landing, resulting in a roll over during the landing flare touchdown.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of engine power(partial) - nonmechanicalCruise - normal
Precautionary landing - performedPilot in command
Rotor rpm - not maintainedPilot in commandCause
Flare - misjudgedPilot in commandCause
Miscellaneous/otherDescent - emergency
Roll overLanding - flare/touchdown

Analysis

N8555K was enroute from shirley, new york, to islip, new york, at a cruising altitude of 1100 feet when the pilot heard a persistent noise from the rear of the aircraft. He attempted a precautionary autorotative landing. The noise persisted throughout descent. At approximately 5 feet above the ground, tail rotor effectiveness was lost, and the helicopter skid made contact with the ground causing a roll over.

Aircraft

Registration
N8555K
Reported as
Robinson R-22 Alpha
Category
Helicopter
Serial number
0446
Engine
Lycoming O-320, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
American Helicopter Corp
Registered owner
American Helicopter Corp
Last inspection
Unknown · January 2, 2000
Departed
HWV · Shirley, NY
Destination
ISP · Ronkonkoma, NY
Airport
NONE · Coram Airpark

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
32
Certificates
Commercial, Flight instructor
Airplane ratings
Multi-engine land, Single-engine land, Multi-engine sea, Single-engine sea
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Flight hours
1,840 total · 157 in this make and model · 1,607 as pilot in command · 180 in the last 90 days · 72 in the last 30 days · 8 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
225° at 7 knots
Visibility
15 statute miles
Lowest ceiling
None