LAX02LA217

NTSB accident investigation · Aerospatiale AS350 BA · Honolulu, HI · July 7, 2002

Accident · No injuriesLimited investigationFinal report
Date
July 7, 2002, 12:00 local (22:00 UTC)
Place
Honolulu, HI
Injuries
4 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N141MKAerospatiale AS350 BA
Weather
Visual (VMC) · Day
Status
Completed · report September 29, 2004
Report
Approved by Office Director
Parties
Federal Aviaiton Administration
FAA report
20020707015129A
Case key
55153

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's failure to maintain adequate tail rotor clearance from the sloping terrain in unfavorable wind conditions.

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.

In flight collision with terrain/waterLanding - flare/touchdown
Terrain condition - downhill
Clearance - not maintainedPilot in commandCause
Weather condition - unfavorable wind

Analysis

The helicopter's tail rotor collided with terrain while the pilot was attempting to land downwind on downsloping terrain. The passengers reported that as the helicopter began the approach to landing, it passed over a 6-foot fence and settled hard onto dirt. The pilot told an FAA inspector that he had landed downhill, because while in the air, he ascertained that would be the best angle to execute a landing in the confined operation zone. The downwind conditions resulted in the tail of the helicopter being lower than normal. During touchdown, the helicopter's tail boom collided with the upslope terrain. The gear box was destroyed and the tail boom was bent 30 degrees.

Factual narrative

On July 7, 2002, about 1200 Hawaiian standard time, an Eurocopter AS350 BA, N141MK, collided with terrain while the pilot was attempting to land near Honolulu, Hawaii. Schuman Aviation, Ltd., was operating the helicopter under the provisions of 14 CFR Part 135. The pilot and three passengers were not injured; the helicopter sustained substantial damage. Visual meteorological conditions prevailed, and a company flight plan had been filed. The nonscheduled domestic passenger flight originated from Honolulu about 1140, with a planned destination of a landing site near Wili Wili Nui Ridge, about 7 miles from Honolulu.

During a telephone interview with the National Transportation Safety Board investigator, passengers reported that the weather was good and the winds were calm. As the helicopter began the approach to landing, it passed over a 6-foot fence and settled hard onto dirt. The tail rotor struck the ground resulting in the loss of a tail rotor blade and damage to the tail boom. The aircraft rotated about 10 to 20 degrees in the dirt and the skids were not damaged.

The Federal Aviation Administration inspector recalled visiting the accident site and examining the helicopter after the accident occurred. He stated that the pilot was attempting to land the helicopter to the south, on downsloping terrain. The pilot told him that he had landed downhill, because while in the air, he ascertained that would be the best angle to execute a landing in the confined operation zone. The downwind conditions resulted in the tail boom of the helicopter being lower than normal. While the pilot was attempting to touchdown, the tail boom collided with the terrain. The gear box was destroyed and the tail boom was bent 30 degrees.

Despite numerous attempts by the Safety Board, the pilot and operator failed to submit an NTSB Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2).

Aircraft

Registration
N141MK
Reported as
Aerospatiale AS350 BA
Category
Helicopter
Serial number
2424
Engine
Turbomeca Arriel 1 Seri, turbo shaft
Damage
Substantial damage
Flight
Part 135
Registered owner
Schuman Aviation Company LTD
Airworthiness certificate
Standard, Normal
Departed
HNL · Honolulu, HI
Airport
Remote Landing Zone

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
43
Injuries
None
Certificate
Commercial
Medical
Class 2, Valid Medical--w/ waivers/lim

Weather

Conditions
Visual (VMC) · Day
Wind
40° at 14 knots, gusting 22
Visibility
10 statute miles
Lowest ceiling
None
Temperature
84 °F, dew point 68 °F
Altimeter
30.06 inHg
Observed at
HNL, 7 nm away

Docket · 1

The files NTSB released with the investigation on July 26, 2004, on NTSB’s docket system: statements, records, photos and specialists’ reports. 31 KB 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 N141MK · 1

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