WPR12CA118

NTSB accident investigation · Eurocopter AS 350 B3 · Poway, CA · February 25, 2012

Accident · No injuriesData collectionFinal report
Date
February 25, 2012, 14:15 local (22:15 UTC)
Place
Poway, CA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N118MBEurocopter AS 350 B3
Defining event
Landing-flare/touchdown: Hard landing
Weather
Visual (VMC) · Day
Status
Completed · report May 3, 2012
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration FSDO
FAA report
20120225004869A
Case key
82971

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 inadequate compensation for wind conditions during landing, which resulted in a hard landing.

Findings · 4

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 · PilotEurocopter AS 350 B3: 14 casesAll aircraft: 9,295 casesProbable cause
Wind: tailwindEnvironmental issues › Conditions/weather/phenomena · Contributed to outcomeEurocopter AS 350 B3: 1 caseAll aircraft: 594 cases
Wind: updraftEnvironmental issues › Conditions/weather/phenomena · Contributed to outcomeEurocopter AS 350 B3: 1 caseAll aircraft: 14 cases
WindEnvironmental issues › Conditions/weather/phenomena · Response/compensationEurocopter AS 350 B3: 1 caseAll aircraft: 110 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 pilot stated that he was approaching a landing zone on a flat pinnacle with a tailwind. The helicopter was within 50 feet of the landing area in a slow, stable, shallow approach when it encountered an updraft. When the helicopter flew out of the updraft, it abruptly descended to the ground. The helicopter landed hard, and the impact buckled the tail boom and sheared off the left landing gear skid.

Factual narrative

The pilot stated that he was approaching a landing zone on a flat pinnacle with a tailwind. The helicopter was in a slow, stable, shallow approach when it encountered an updraft within 50 feet of the landing area. When the helicopter flew out of the updraft, it abruptly descended to the ground. The helicopter contacted the ground in a flat orientation, and the impact buckled the tail boom and sheared the left landing gear skid off.

Aircraft

Registration
N118MB
Reported as
Eurocopter AS 350 B3
Category
Helicopter
Serial number
3535
Airframe hours
5,473
Engine
Turbomeca ARRIEL 2B1, 848 horsepower, turbo shaft
Damage
Substantial damage
Flight
Positioning · Part 91
Operator
Mountain Air Helicopters Inc
Registered owner
Mountain Air Helicopters Inc
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · February 5, 2012
Departed
N/A · Poway, CA
Destination
N/A · Poway, CA
Flight plan
Unknown

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
63
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea
Instrument ratings
Airplane, Helicopter
Medical
Class 2, With waivers/limitations
Last flight review
June 16, 2011
Seat
Right
Flight hours
16,701 total · 2,181 in this make and model · 16,626 as pilot in command · 200 in the last 90 days · 115 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
310° at 10 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
64 °F, dew point 48 °F
Altimeter
30.05 inHg
Observed at
NKS, 8 nm away

Docket · 1

The files NTSB released with the investigation on March 27, 2012, 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.