FTW94MA235

NTSB accident investigation · Aerospatiale AS350D · Hanalei, HI · July 15, 1994

Accident · FatalMajor investigationFinal report
Date
July 14, 1994, 15:36 local (Jul 15, 1994, 01:36 UTC)
Place
Hanalei, HI
Injuries
3 fatal, 4 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N151BHAerospatiale AS350D
Weather
Visual (VMC) · Day
Status
Completed · report June 26, 1995
Report
Approved by Office Director
Safety recommendations
Yes
FAA report
19940714046529A
Case key
19180

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

Failure of the engine-driven fuel pump, which resulted in the loss of power, and the lack of aircraft flotation equipment. Factors related to the accident were: flight over water adjacent to terrain that afforded no suitable forced landing site, and the lack of a passenger briefing by the operator on the location and operation of life preservers.

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.

Loss of engine power(total) - mech failure/malfCruise
Fuel system,pump - failureCause
Forced landingEmergency descent/landing
DitchingLanding
Crew/group briefing - inadequateCompany/operator managementFactor
Planning/decision - improperFactor
Misc rotorcraft,emergency floatation gear - not installedCause
Terrain condition - none suitableFactor
Terrain condition - water

Analysis

The helicopter was on a 14 CFR part 135 air tour operation with a pilot & 6 passengers aboard. It was flying parallel to the shoreline when a complete loss of engine power occurred. The pilot performed an autorotation to the water about 150' from a cliff shoreline. The helicopter was not equipped with floats. All occupants exited the helicopter uninjured as it was sinking. Life vests were aboard the helicopter, but were not worn by the occupants. Three of the passengers managed to climb onto rocks & were eventually rescued by helicopter. They indicated that they had not been briefed that life preservers were aboard the helicopter. The other four occupants were unable to climb onto rocks along the shore. One of these (a passenger) was rescued by personnel of a boat. The pilot & the other two passengers drowned. The helicopter was recovered from the ocean. An exam & tests of components revealed the internal drive splines of the engine-driven fuel pump (MFP-261) had worn to the point of slippage. This failure would have resulted in a total loss of engine power.

Factual narrative

See Group Chairman's Factual Report.

Aircraft

Registration
N151BH
Reported as
Aerospatiale AS350D
Category
Helicopter
Serial number
1298
Airframe hours
7,221
Engine
Lycoming LTS-101-A3, 650 horsepower, turbo shaft
Damage
Substantial damage
Flight
Part 135
Operator
Papillon Hawaiian Helicopters, doing business as Papillon Hawaiian Helicopters
Registered owner
Papillon Helicopters, Ltd.
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · July 13, 1994 · 5 hours before
Departed
LIH · Lihue, HI
Destination
LIH · HI
Flight plan
Company VFR

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
49
Certificates
Commercial, Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Helicopter, Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Right
Toxicology
Performed
Flight hours
12,800 total · 3,000 in this make and model · 319 in the last 90 days · 119 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
60° at 14 knots
Visibility
15 statute miles
Lowest ceiling
None
Temperature
82 °F, dew point 68 °F
Altimeter
30.00 inHg
Observed at
LIH, 21 nm away

Docket · 41

The files NTSB released with the investigation on October 1, 1995, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.7 MB in all.

Refer to NTSB public hearing # PUB95HA001 for additional informationItem 1 · .PDF · 11 KBPhoto 1: Accident area taken with survivor's cameraItem 2 · .PDF · 29 KBPhoto 2: Accident area taken with survivor's cameraItem 3 · .PDF · 41 KBPhoto 3: Accident area taken with survivor's cameraItem 4 · .PDF · 35 KBPhoto 4: Napali Coast Accident siteItem 5 · .PDF · 36 KBPhoto 5: Napali Coast Accident SiteItem 6 · .PDF · 42 KBPhoto 6: Submerged AircraftItem 7 · .PDF · 35 KBPhoto 7: Submerged AircraftItem 8 · .PDF · 46 KBPhoto 8: Kahului Airport Helo RampItem 9 · .PDF · 46 KBPhoto 9: Kahului Airport Heo RampItem 10 · .PDF · 52 KBPhoto 10: Kahului Airport Helo RampItem 11 · .PDF · 48 KBPhoto 11: Kahului Airport Helo RampItem 12 · .PDF · 44 KBFactual Report of Group Chairman - Survival FactorsItem 13 · .PDF · 608 KBMaintenance Records - Part 1 of Factual Report of Group Chairman (Includes 27 Photo's)Item 14 · .PDF · 1.6 MBPhoto 1. Fuel Drive Spine.Item 15 · .PDF · 43 KBPhoto 2. Drive Spline.Item 16 · .PDF · 31 KBPhoto 3. Blue MRB top surface.Item 17 · .PDF · 32 KBPhoto 4. Red/yellow main rotor.Item 18 · .PDF · 27 KBPhoto 5. M.R.B. botom surface.Item 19 · .PDF · 31 KBPhoto 6. N151BHItem 20 · .PDF · 38 KBPhoto 7. Star arm fracture.Item 21 · .PDF · 41 KBPhoto 8. Tail drive shaft.Item 22 · .PDF · 35 KBPhoto 9. Tail drive shaft.Item 23 · .PDF · 40 KBPhoto 10. Flex coupling.Item 24 · .PDF · 34 KBPhoto 11. N151BHItem 25 · .PDF · 49 KBPhoto 12. B nut leak check.Item 26 · .PDF · 48 KBPhoto 13. Fuel from fuel pump discharge.Item 27 · .PDF · 50 KBPhoto 14. Spray test fuel nozzles.Item 28 · .PDF · 47 KBPhoto 15. Engine Controls.Item 29 · .PDF · 35 KBPhoto 16. Door Emerg. Handle.Item 30 · .PDF · 37 KBPhoto 17. RH door release.Item 31 · .PDF · 38 KBPhoto 18. Other acft. door release.Item 32 · .PDF · 33 KBPhoto 19. In-service door.Item 33 · .PDF · 32 KBPhoto 20. N151BHItem 34 · .PDF · 39 KBPhoto 21. N151BHItem 35 · .PDF · 45 KBPhoto 22. N151BHItem 36 · .PDF · 42 KBPhoto 23. N151BHItem 37 · .PDF · 50 KBPhoto 24. N151BHItem 38 · .PDF · 29 KBPhoto 25. Belly panel.Item 39 · .PDF · 34 KBPhoto 26. Fuel pump pad.Item 40 · .PDF · 45 KBPhoto 27. Fuel pump drive gear.Item 41 · .PDF · 48 KB

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.