LAX00LA103

NTSB accident investigation · Hughes 369HS · Pacific Ocean (Pacific Ocean) · February 14, 2000

Accident · No injuriesLimited investigationFinal report
Date
February 14, 2000
Place
Pacific Ocean (Pacific Ocean)
Injuries
2 uninjured
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N717STHughes 369HS
Weather
Visual (VMC) · Day
Status
Completed · report July 17, 2001
Report
Approved by Office Director
FAA report
20000214011339A
Case key
48702

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

An unknown mechanical malfunction that resulted in a precautionary landing at sea and the subsequent sinking of the helicopter by an ocean swell.

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.

Airframe/component/system failure/malfunctionCruise
Reason for occurrence undetermined
On ground/water encounter with terrain/waterLanding - flare/touchdown
Terrain condition - large wave/swellCause
Precautionary landing - initiatedPilot in commandCause

Analysis

On the third flight of the day, at 100 feet after takeoff from the fishing vessel, the pilot reported that he felt a grinding sensation from the cyclic control followed by a loud bang. After making the precautionary landing, the helicopter was struck by an ocean swell, rolled over, and subsequently sank. The pilot and observer were rescued uninjured from the water by the fishing vessel. It was noted that the foreign pilot did not possess a U.S. flight certificate.

Factual narrative

On February 14, 2000, at 1700 local meridian time, a Hughes 369HS, N717ST, made a precautionary landing due to engine problems in international waters on the Pacific Ocean about 500 miles north of Papua, New Guinea. The helicopter, operated by O'Hara Helicopters, Inc., under 14 CFR Part 91 as a fish spotting operation, subsequently sank in deep water after rolling over in a large ocean swell. The pilot, who held an Australian commercial pilot certificate, and one passenger were not injured. Visual meteorological conditions prevailed for the aerial observation flight. The flight originated from a fishing vessel at an unknown time.

In the pilot's written statement to the Safety Board, he reported that this was the third flight of the day. After takeoff, at 100 feet, he felt a metal-on-metal grinding sensation through the cyclic and then a loud noise. The pilot noted that prior to the precautionary landing the helicopter responded "abnormally" to control inputs. He elected to land immediately on the water instead of attempting to return to the vessel due to safety precautions. The pilot stated that the ocean conditions were rough and after exiting the helicopter it was overturned by a large swell and sank. The pilot and observer were rescued from the water by the fishing vessel.

According to an inspector from the Federal Aviation Administration (FAA) International Flight Operations (IFO) division, who reviewed the FAA pilot certification database, the pilot did not possess a U.S. flight certificate.

Aircraft

Registration
N717ST
Reported as
Hughes 369HS
Category
Helicopter
Serial number
350717S
Airframe hours
6,221
Engine
Allison 250-C10, 315 horsepower, turbo shaft
Damage
Destroyed
Flight
Aerial observation · Part 91
Registered owner
O'Hara Helicopters Inc.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · December 6, 1999 · 92 hours before

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
34
Certificates
Foreign, Commercial
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
2,470 total · 365 in this make and model

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Lowest ceiling
None

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 N717ST · 1

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