ASN Wikibase Occurrence # 221896
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| Date: | Saturday 3 November 2018 |
| Time: | 11:55 LT |
| Type: |  Robinson R44 |
| Owner/operator: | |
| Registration: | ZS-RHY |
| MSN: | 0297 |
| Year of manufacture: | 1996 |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Private farm near Witbank -
 South Africa
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Private farm near Witbank |
| Private farm near Witbank | |
| Investigating agency: | CAA S.A. |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
The pilot accompanied by three passengers took off from a private farm with the intention to conduct a local private flight in the area.
The pilot stated that this was his third flight of the day and each time he took off from the same open area on the farm. He further indicated that he changed his route slightly on the third flight (the accident flight) and was flying to some high ground but remained to the south of it on the leeward side. As he completed a right turn, the low main rotor revolutions per minute (RPM) horn sounded. He lowered the collective pitch lever and tried to fly out of the condition but the RPM continued to decay. He decided to do a run-on landing and due to the low rotor RPM the helicopter touched down hard on rocky terrain. The skid gear broke off and the helicopter continued to skid on its lower fuselage for several meters before coming to rest and rolling over onto its left-hand side. The pilot stated that the wind was north north-easterly (NNE) at approximately 15 to 20 kt.
None of the occupants on-board the helicopter sustained any injuries. The helicopter sustained substantial damage during the accident sequence.
The investigation revealed that the accident attributed to a decay in main rotor RPM which was induced by a down-draft on the leeward side of mountainous resulting on an unsuccessful forced landing onto rocky terrain.
Accident investigation:
 |
|
Sources:
SACAA
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Feb-2019 12:08 | harro | Added |
Corrections or additions? ... Edit this accident description
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