ASN Wikibase Occurrence # 356649
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| Date: | Monday 23 September 1996 |
| Time: | 22:45 LT |
| Type: |  Hughes 269C |
| Owner/operator: | City Of Houston |
| Registration: | N7492F |
| MSN: | 350401 |
| Total airframe hrs: | 11500 hours |
| Engine model: | Lycoming HIO-360-D1A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Houston, TX -
 United States of America
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | (KHOU) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The flight instructor was demonstrating an autorotation from 50 feet AGL to a grassy area. The helicopter touched down with skids level and the flight instructor increased the collective to keep the aircraft skids light on the ground and to maintain a straight ground track. The helicopter had traveled approximately 70 feet, and was moving at approximately 20 knots when the aircraft pitched forward and to the right. The flight instructor 'felt at least three severe impacts to the aircraft and then the aircraft was stopped.' Examination of the helicopter revealed that the left and right skid tubes were fractured, and the right skid was detached from its front and rear gear dampers. The tailboom and tail rotor were 'sheared off' by the 'main rotor blades.' Further examination of the skids revealed that the bottom of the right skid tube was 'worn beyond the manufacturers tolerances.' According to an FAA inspector, a 'certified A&P [mechanic] failed to follow inspection procedures as outlined in [the] work card and [the] Manufacturer Maintenance Manual.'
Probable Cause: company maintenance personnel not complying with maintenance procedures and directives to inspect the helicopter's skids, which allowed the right skid to wear beyond the manufacturer's tolerances.
Accident investigation:
 |
|
Sources:
NTSB FTW96TA398
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Mar-2024 09:25 | ASN Update Bot | Added |
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