ASN Wikibase Occurrence # 371825
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| Date: | Thursday 26 November 1987 |
| Time: | 09:10 LT |
| Type: |  Hughes 369HS |
| Owner/operator: | Kauai Helicopters |
| Registration: | N77DJ |
| MSN: | 1240683S |
| Total airframe hrs: | 3932 hours |
| Engine model: | Allison 250-C20B |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Lihue, Kauai, HI -
 United States of America
|
| Phase: | Unknown |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT, WHO WAS ALSO A CERTIFICATED AIRFRAME & POWERPLANT MECH, RECENTLY CHANGED THE TAILBOOM ASSY. AT THE TIME OF THE ACCIDENT HE WAS CONDUCTING A MAINTENANCE TEST FLIGHT. THE PILOT EXECUTED ONE AUTOROTATION WITH A POWER RECOVERY. THE PLT REENTERED THE TRAFFIC PATTERN. GND WITNESSES REPTD THAT WHEN THE HELICOPTER ENTERED THE BASE LEG THEY HEARD AN EXPLOSIVE SOUND FOLLOWED BY THE TAILBOOM ASSY SEPARATING FROM THE HELICOPTER. THE WRECKAGE EXAM DSCLSD THE MAIN ROTOR BLADE STRUCK THE TAILBOOM. THE TAIL ROTOR BLADES WENT OUT OF TRACK AND STRUCK THE VERTICAL FINS, SEPARATING THE UPPER VERTICAL FIN. NO EVIDENCE OF ANY PREEXISTING MALFUNCTIONS WAS FOUND. THE MAIN ROTOR BLADES EXHIBITED LOW ROTOR RPM DAMAGE.
Probable Cause: PILOT FAILURE TO MAINTAIN ADEQUATE MAIN ROTOR RPM.
Accident investigation:
 |
|
Sources:
NTSB LAX88LA059
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 26-Mar-2024 10:38 | ASN Update Bot | Added |
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