ASN Wikibase Occurrence # 353744
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| Date: | Thursday 24 September 1998 |
| Time: | 16:40 LT |
| Type: |  Hughes 500 |
| Owner/operator: | Boeing Helicopters |
| Registration: | N685F |
| MSN: | 0512E |
| Total airframe hrs: | 3245 hours |
| Engine model: | Allison 250-C20B |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Mesa, AZ -
 United States of America
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | Falcon Field, AZ (KFFZ) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The instructor pilot and his student were practicing autorotations to a turf area, which was wet and soft. The instructor pilot demonstrated a 180-degree autorotation, which he said appeared to finish with a normal deceleration flare and touchdown. After touchdown the instructor pilot stated he heard a loud rattling sound coming from the tailboom. The aircraft was examined and found that during the autorotation, the tailrotor blades had hit the ground causing damage to the tail rotor blades and tailboom, and it had severed the tail rotor driveshaft. Ground witnesses said the helicopter hit the ground harder than normal.
Probable Cause: A hard landing caused by the pilot's improper flare during a simulated autorotatative landing. A factor in the accident was the soft wet sod landing area.
Accident investigation:
 |
|
Sources:
NTSB LAX98LA304
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Mar-2024 10:04 | ASN Update Bot | Added |
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