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NTSB accident investigation · Hughes TH 55 · Keene, NH · March 13, 2019

Accident · No injuriesData collectionFinal report
Date
March 13, 2019, 18:00 local (22:00 UTC)
Place
Keene, NH
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N8045HHughes TH 55
Defining event
Enroute: Birdstrike
Weather
Visual (VMC) · Day
Status
Completed · report November 6, 2019
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20190313001269A
Case key
99124

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 helicopter’s collision with a bird during cruise flight.

Findings · 2

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.

Object/animal/substance: animal(s)/bird(s)Environmental issues › Physical environment · Effect on operationHughes TH-55: 1 caseAll aircraft: 358 casesProbable cause
Object/animal/substance: animal(s)/bird(s)Environmental issues › Physical environment · Ability to respond/compensateHughes TH-55: 1 caseAll aircraft: 358 casesProbable cause

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 helicopter pilot reported that, while en route, about 2 miles northeast from his destination airport and about 500 ft above ground level and 60 knots, he heard a loud "thud" from a possible bird strike, and the upper right windscreen/canopy shattered, with pieces going into the main rotor disc and cabin. He continued to the airport and landed without further incident. The helicopter sustained substantial damage to the main rotor blades. The pilot reported that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation.

Factual narrative

The helicopter pilot reported that while enroute, about 2 miles northeast from his destination airport, about 500 feet above ground level and 60 knots, he heard a loud "thud" from a possible bird strike and the upper right windscreen/canopy shattered, with pieces going into the main rotor disc and cabin. He continued to the airport and landed without further incident. The helicopter sustained substantial damage to the main rotor blades. The pilot, a certificated Airframe and Powerplant mechanic with Inspection Authorization, reported that after his examination, the main rotor blade damages were beyond the manufacturer's guidance and repair limits. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Aircraft

Registration
N8045H
Reported as
Hughes TH 55 (269A)
Category
Helicopter
Serial number
65-18240
Built
1967
Airframe hours
5,317.2
Engine
Lycoming HIO-360-B1A, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · October 15, 2018
Departed
Keene, NH
Destination
EEN · Keene, NH
Airport
EEN · Dillant-Hopkins, runway 32, 4,001 × 150 ft, asphalt
Equipment
Electronic flight bag or handheld device

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
35
Injuries
None
Certificates
Private, Commercial
Airplane ratings
Single-engine land
Instrument ratings
Helicopter
Medical
Class 1, With waivers/limitations
Last flight review
June 6, 2017
Seat
Right
Restraint
4-point
Flight hours
550 total · 25 in this make and model · 415 as pilot in command · 44 in the last 90 days · 7.1 in the last 30 days · 1.3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
14 °F, dew point 12 °F
Altimeter
30.34 inHg
Observed at
KLEB, 19 nm away

Docket · 3

The files NTSB released with the investigation on April 2, 2019, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.3 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.

Other investigations on N8045H · 1

Matched to the same aircraft by N-number and date.