ERA16CA313

NTSB accident investigation · Bell Helicopter Textron Canada 429 · Rikers Island, NY · September 1, 2016

Accident · No injuriesData collectionFinal report
Date
September 1, 2016, 13:00 local (17:00 UTC)
Place
Rikers Island, NY
Injuries
6 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N917PDBell Helicopter Textron Canada 429
Defining event
Maneuvering-hover: Abrupt maneuver
Weather
Visual (VMC) · Day
Status
Completed · report May 15, 2017
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20160901015829A
Case key
94004

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

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Probable cause

The pilot’s overcontrolling of the helicopter during an aborted slope landing from a hover, which resulted in a main rotor blade strike.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Main rotor system: main rotor blade systemAircraft › Aircraft propeller/rotor · Related operating infoBell Helicopter Textron Canada 429: 2 casesAll aircraft: 60 casesProbable cause
Terrain: sloped/uneven terrainEnvironmental issues › Physical environment · Effect on operationBell Helicopter Textron Canada 429: 1 caseAll aircraft: 270 cases

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot was landing the helicopter on a nose-up slope when he "noticed the helicopter started to tilt aft." As the pilot "immediately" increased collective pitch and applied forward cyclic to abort the landing, three of the four main rotor blades struck the wire strike protection system on the cabin roof, which resulted in substantial damage to the blades. Representatives from the helicopter manufacturer examined the helicopter, replaced the three damaged rotor blades, and then returned the helicopter to service. According to the pilot, there were no mechanical deficiencies with the helicopter that would have prevented normal operation.

Factual narrative

The pilot was landing the helicopter on a nose-up slope when he "noticed the helicopter started to tilt aft." As the pilot "immediately" increased collective pitch and applied forward cyclic to abort the landing, 3 of 4 main rotor blades struck the wire strike protection system on the cabin roof, which resulted in substantial damage to the blades. Representatives from the helicopter manufacturer inspected the helicopter, replaced the 3 damaged rotor blades, and the helicopter was returned to service. According to the pilot, there were no mechanical deficiencies with the helicopter that prevented normal operation.

Aircraft

Registration
N917PD
Reported as
Bell Helicopter Textron Canada 429 (NO SERIES)
Category
Helicopter
Serial number
57148
Built
2013
Airframe hours
1,491.6
Engines
Pratt & Whitney PW207D1, 550 horsepower, turbo shaftPratt & Whitney PW207D1, 550 horsepower, turbo shaft
Damage
Substantial damage
Flight
Public aircraft · Public use
Operator
New York City Police Department
Registered owner
New York City Police Department
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · August 19, 2016 · 20 hours before
Departed
JRB · New York, NY
Destination
Rikers Island, NY
Equipment
Electronic primary flight display, Auto-pilot, Data recorder, Electronic multifunction display

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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
39
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Helicopter, Airplane
Medical
Class 2, Without waivers/limitations
Last flight review
March 4, 2016
Seat
Right
Restraint
4-point
Flight hours
1,015 total · 200 in this make and model · 600 as pilot in command · 50 in the last 90 days · 20 in the last 30 days
Role
Other flight crew
Age
42
Injuries
None
Certificate
Private
Medical
Class 2, With waivers/limitations
Last flight review
April 21, 2016
Seat
Left
Restraint
4-point
Flight hours
198 total · 0 in this make and model · 100 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
90° at 8 knots
Visibility
10 statute miles
Lowest ceiling
3,400 ft broken
Altimeter
29.79 inHg
Observed at
KLGA

Docket · 2

The files NTSB released with the investigation on April 12, 2017, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.4 MB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.