CircumFlightN7456F Hughes 269C accident
NTSB LAX90LA065 · 1990-01-06 · RIALTO, CA · near L67
Docket — crew, injuries and powerplant
Factual narrative
WHILE HOVERING, THE INSTRUCTOR PILOT LOST CONTROL OF THE HELICOPTER BY ALLOWING THE STUDENT PILOT TO OVERCORRECT THE CONTROLS AND BY NOT TAKING IMMEDIATE CORRECTIVE ACTION. AFTER HE RECOGNIZED THE DETERIORATING CONDITION, HE TRIED TO RECOVER A GROUND RESONANCE PROBLEM. SHORTLY AFTERWARD, THE HELICOPTER ROLLED OVER ON ITS SIDE. NO PRIOR MECHANICAL PROBLEM WAS REPORTED.
Probable cause
THE LACK OF ADEQUATE SUPERVISION BY THE INSTRUCTOR PILOT DURING A CRITICAL PHASE OF FLIGHT WHEN HE ALLOWED A STUDENT TO PERFORM IN AN UNSAFE MANNER WITHOUT TAKING IMMEDIATE CORRECTIVE ACTION. The National Transportation Safety Board determined the probable cause of this accident.
Circumstances
- Event type
- Accident
- Highest injury
- None
- Weather conditions
- Visual Meteorological Cond
- Light condition
- Day
- Sky condition
- NONE
- Ceiling (ft)
- 0
- Visibility (sm)
- 30
- Wind direction
- 0
- Temperature (F)
- 70
- Nearest airport
- RIALTO
- Distance from field
- 0.0
- Airport elevation
- 1429
Aircraft
| Registration | Make | Model | Damage | FAR part |
|---|---|---|---|---|
| N7456F | HUGHES | 269C | DEST | 091 |
Sequence of events
| # | Occurrence | Phase |
|---|---|---|
| 1 | 250 | Cruise |
| 2 | 230 | Cruise |
Findings
| Finding | |
|---|---|
| 24627 | cause |
| 23200 | cause |
| 24542 | factor |