Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Kualapuu, Hawaii 96757
Thursday, June 26, 2003 13:15 HST
NTSB Narrative Summary Released at Completion of Accident
The pilot made a hard landing in the single-engine helicopter after experiencing a loss of engine power at 40 knots and 150 feet agl. The pilot was conducting fire suppression operations and had maneuvered the helicopter over a pond to pickup water. He heard a loud bang and looked over his shoulder to observe white smoke coming from the engine exhaust. The pilot entered an autorotation and began a flare at 50 feet agl with a high rate of descent. The helicopter impacted the ground and a fire ignited. The engine accumulated approximately 1,043 hours since undergoing a modification to its turbine section (approximately 707 hours short of its recommended overhaul time). The modification was part of a commercial engine bulletin, which converted the engines to obtain better performance "from the improved power turbine air flow characteristics." The conversion included a replacement of the 3rd and 4th stage turbine nozzles and wheels. A post-accident examination of the engine revealed the airfoils on the 3rd stage wheel failed as a result of fatigue cracking that originated at the airfoil's trailing edge and progressed toward the leading edge of the blades. All of the 3rd stage airfoils displayed some form of cracking near the airfoil roots at their trailing edges. A number of the cracks were attributed to fatigue propagation; however, some were attributed to overload. The 3rd stage turbine wheel and airfoils met the manufacturer's specifications and no material flaws or defects were noted at the fatigue cracking origins. The reason for the fatigue cracking and subsequent failures could not be determined.
NTSB Probable Cause Narrative
the total loss of engine power resulting from a fatigue failure of the 3rd stage turbine wheel airfoils. The reason for the airfoil's fatigue failure could not be determined.
Event Information
| Type of Event | Accident |
| Event Date | 6/26/2003 |
| Event Day of the Week | Thursday |
| Time of Event | 1315 |
| Event Time Zone | Hawaii Standard Time |
| Event City | Kualapuu |
| Event State | HAWAII |
| Event Country | -- |
| Zipcode of the event site | 96757 |
| Event Date Year | 2003 |
| Event Date Month | 6 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 210700N |
| Event Location Longitude | 1570600W |
| Event Location Airport | -- |
| Event Location Nearest Airport ID | -- |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | -- |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1254 Hawaii Standard Time |
| Direction of event from weather observation facility (degrees) | 80 |
| Weather Observation Facility ID | MKK |
| Elevation of weather observation facility | 454 |
| Distance of event from weather observation facility (units?) | 4 |
| Time Zone of the weather observation | HST |
| Lighting Conditions | Day |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | 3200 |
| Sky/Lowest/Cloud Conditions | Scattered |
| Sky Condition for Lowest Ceiling | -- |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 27 |
| Dew Point at event time (in degress fahrenheit) | 22 |
| Wind Direction (degrees magnetic) | 40 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 14 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Gusting |
| Wind Gust (knots) | 18 |
| Altimeter Setting at event time (in. Hg) | 29.99 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | Serious |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | 1 |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 16950 |
| NTSB Notification Source | FAA |
| NTSB Notification Date | Jun 26 2003 12:00AM |
| NTSB Notification Time | 1557 |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Dec 28 2004 12:45PM |
| User who most recently changed record | NTSB\JOHB |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Honolulu, HI |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N633WA |
| NTSB Number | LAX03LA212 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 133: Rotorcraft Ext. Load |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | No |
| Damage | Substantial |
| Aircraft Fire | Ground |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Hughes |
| Aircraft Model | 369D |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 1260042D |
| Certified Max Gross Weight | 3000 |
| Aircraft Category | Helicopter |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 5 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | 100 Hour |
| Date of Last Inspection | Jun 6 2003 12:00AM |
| Airframe hours since last inspection | 52.3 |
| Airframe Hours | 12804.6 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | Windward Aviation Inc. |
| Aircraft Owner Street Address | 333 Dairy Road, Suite 103 |
| Aircraft Owner City | Kahului |
| Aircraft Owner State | HI |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 96732 |
| Operator is an individual? | No |
| Operator Name | -- |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | -- |
| Operator State | -- |
| Operator Country | -- |
| Operator Zip code | -- |
| Operator Code | WVXA |
| Owner has at least one certificate | -- |
| Other Operator of large aircraft? | -- |
| Certified for Part 133 or 137 Operation | External Load |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | -- |
| Indicates Domestic or International Flight | -- |
| Operator carrying Pax/Cargo/Mail | -- |
| Type of Flying (Per_Bus / Primary) | Other Work Use |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | MKK |
| Departure City | Molokai |
| Departure State | HI |
| Departure Country | USA |
| Departure Time | 1300 |
| Departure Time Zone | HST |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | -- |
| Destination City | -- |
| Destination State | -- |
| Destination Country | -- |
| Specific Phase of Flight | Maneuvering |
| Report sent to ICAO? | No |
| Evacuation occurred | No |
| Date of most recent change to record | Oct 26 2004 4:33PM |
| User who most recently changed record | COOS |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | NA |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |