WPR14CA385

NTSB accident investigation · Robinson Helicopter R44 · Mokuleia, HI · September 22, 2014

Accident · No injuriesData collectionFinal report
Date
September 21, 2014, 15:00 local (Sep 22, 2014, 01:00 UTC)
Place
Mokuleia, HI
Injuries
4 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N8375ERobinson Helicopter R44
Defining event
Approach: Miscellaneous/other
Weather
Visual (VMC) · Day
Status
Completed · report November 13, 2014
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
FAA
FAA report
20140921019789A
Case key
90139

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 failure to maintain aircraft control during landing with a quartering tailwind, which resulted in a hard landing.

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.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotAll aircraft: 9,295 casesProbable cause
Wind: tailwindEnvironmental issues › Conditions/weather/phenomena · Effect on operationAll aircraft: 594 cases
Performance/control parameters: descent rateAircraft › Aircraft oper/perf/capability · Not attained/maintainedAll aircraft: 242 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

When the helicopter was inbound to the destination airport, one of the two pilots radioed for the wind information, and was provided a wind direction of 310 degrees at a speed of 10 knots by the Unicom operator. The pilot flew a left traffic pattern for runway 8, which according to the flying pilot, was a "normal approach for winds from the northeast." The pilot planned to land on the compass rose painted just north of the threshold of runway 8. The flight and approach were normal through the turn to the base leg. On short final or in the flare, the helicopter began descending too quickly, and the pilots were unable to arrest the descent before the helicopter struck the ground. The helicopter remained upright; the pilots shut down the helicopter and de-boarded the passengers. The helicopter sustained substantial damage to the tail, tail rotor, tail boom, and fuselage. Although both pilots stated that the helicopter experienced a "settling with power" event, neither pilot could recall the reported winds. The flying pilot reported no preimpact mechanical malfunctions or failures with the helicopter that would have precluded normal operation.

Factual narrative

When the helicopter was inbound to the destination airport, one of the two pilots radioed for the wind information, and was provided a wind direction of 310 degrees at a speed of 10 knots by the Unicom operator. The pilot flew a left traffic pattern for runway 8, which according to the flying pilot, was a "normal approach for winds from the northeast." The pilot planned to land on the compass rose painted just north of the threshold of runway 8. The flight and approach were normal through the turn to the base leg. On short final or in the flare, the helicopter began descending too quickly, and the pilots were unable to arrest the descent before the helicopter struck the ground. The helicopter remained upright; the pilots shut down the helicopter and de-boarded the passengers. The helicopter sustained substantial damage to the tail, tail rotor, tail boom, and fuselage. Although both pilots stated that the helicopter experienced a "settling with power" event, neither pilot could recall the reported winds. The flying pilot reported no preimpact mechanical malfunctions or failures with the helicopter that would have precluded normal operation.

Aircraft

Registration
N8375E
Reported as
Robinson Helicopter R44
Category
Helicopter
Serial number
0385
Built
1997
Airframe hours
2,059
Engine
Lycoming O-540 SERIES, 250 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · July 2, 2014 · 50 hours before
Departed
PHNL · Honolulu, HI
Destination
PHDH · Mokuleia, HI
Airport
PHDH · Dillingham Field, runway 8, 9,007 × 75 ft, asphalt

Flight crew · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
65
Injuries
None
Certificates
Airline transport, Commercial, Flight engineer
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
April 19, 2014
Seat
Left
Restraint
3-point
Flight hours
21,947 total · 22 in this make and model · 19,730 as pilot in command · 50 in the last 90 days · 28 in the last 30 days · 2 in the last 24 hours
Role
Pilot
Age
32
Injuries
None
Certificate
Private
Medical
Class 3, With waivers/limitations
Last flight review
April 18, 2014
Seat
Right
Restraint
3-point
Flight hours
310 total · 310 in this make and model · 259 as pilot in command · 43 in the last 90 days · 30 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
310° at 10 knots
Observed at
PHDH

Docket · 7

The files NTSB released with the investigation on November 5, 2014, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.5 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.