ASN Wikibase Occurrence # 360168
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| Date: | Thursday 14 July 1994 |
| Time: | 18:45 LT |
| Type: |  Aerospatiale AS350B |
| Owner/operator: | Hawaii Helicopers |
| Registration: | N350MH |
| MSN: | 2199 |
| Total airframe hrs: | 5337 hours |
| Engine model: | TURBOMECA ARRIEL 1B |
| Fatalities: | Fatalities: 0 / Occupants: 7 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Kalaupapa, HI -
 United States of America
|
| Phase: | Landing |
| Nature: | Unknown |
| Departure airport: | Kahului, HI (OGG) |
| (KOGG) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE HELICOPTER WAS ON A 14 CFR PART 135 AIR TOUR FLIGHT, WHICH WAS SCHEDULED TO TOUR AROUND THE ISLAND OF MAUI. THE PILOT MADE THE DECISION TO TOUR THE ISLAND OF MOLOKAI WHEN WEATHER ALONG HIS SCHEDULED ROUTE DETERIORATED. HE DID NOT INFORM THE COMPANY OF THE ROUTING CHANGE. WHILE IN A HOVER APPROXIMATELY 150 FEET FROM A SHORE LINE, ROTOR RPM DETERIORATED AND THE INFLATABLE FLOAT-EQUIPPED HELICOPTER MADE AN EMERGENCY LANDING IN THE WATER. THE FLOATS WERE DEPLOYED AS THE HELICOPTER ENTERED THE WATER; HOWEVER, THE LANDING WAS HARD AND THE HELICOPTER SUSTAINED SUBSTANTIAL DAMAGE. (TO DEPLOY THE FLOATS, THE PILOT WAS REQUIRED TO REMOVE HIS HAND FROM THE COLLECTIVE CONTROL.) THE PILOT AND FIVE OF THE PASSENGERS WERE NOT INJURED. THE REMAINING PASSENGER RECEIVED SERIOUS INJURIES. AFTER LANDING, THE SEVEN OCCUPANTS DONNED LIFE VESTS AND SWAM TO THE SHORE WHERE THEY SPENT THE NIGHT BEFORE BEING LOCATED BY AIRBORNE SEARCH PERSONNEL. THE HELICOPTER DRIFTED ASHORE AND WAS EXAMINED. NO EVIDENCE OF A PREIMPACT MECHANICAL FAILURE OR MALFUNCTION WAS FOUND.
Probable Cause: THE PILOT'S FAILURE TO PROPERLY MONITOR POWER REQUIRED VERSUS POWER AVAILABLE TO MAINTAIN ROTOR REVOLUTIONS PER MINUTE (RPM), RESULTING IN ROTOR RPM DECAY AND A FORCED LANDING. FACTORS RELATED TO THE ACCIDENT WERE: THE PILOT'S CHANGE OF THE TOUR ROUTE WITHOUT NOTIFYING THE COMPANY, WHICH DELAYED RESCUE, AND THE LOCATION OF THE ARM AND FIRE SWITCHES FOR THE FLOTATION EQUIPMENT, WHICH REQUIRED THE PILOT TO REMOVE HIS HAND FROM THE COLLECTIVE CONTROL TO ACTIVATE THAT EQUIPMENT.
Accident investigation:
 |
|
Sources:
NTSB FTW94MA236
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Mar-2024 18:37 | ASN Update Bot | Added |
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