ASN Wikibase Occurrence # 272764
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| Date: | Friday 25 September 2009 |
| Time: | |
| Type: |  Robinson R44 Raven II |
| Owner/operator: | |
| Registration: | ZS-RMN |
| MSN: | 0910 |
| Year of manufacture: | 2000 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Lawley, Ennerdale South of Soweto -
 South Africa
|
| Phase: | |
| Nature: | |
| Departure airport: | Rand Aerodrome (FAGM) Gauteng |
| Grand Central Aerodrome (FAGC) Gauteng | |
| Investigating agency: | CAA S.A. |
| Confidence Rating: |  Accident investigation report completed and information captured |
On 25 September 2009 at approximately 2100Z, the pilot and a passenger, an air tracker, were doing vehicle tracking in the Lawley area when suddenly the throttle start 'hunting'? (opening and closing movement of the throttle). During a left turn he suddenly heard a high- pitched sound. He then observed the engine and rotor rpm over-revving on the rpm gauge. The pilot then levelled the helicopter, closed the throttle and lowered the collective pitch lever slightly to terminate control of the rpm. This action did not resolve the overspeed condition, and the pilot put the helicopter in autorotation. A hard landing followed and the main rotor blades severed the tail boom. The helicopter sustained substantial damage during the hard landing. Neither the pilot nor his passenger were injured in the course of the accident. Probable Cause Unsuccessful emergency landing following a reported in-flight engine and rotor overspeed condition.
Accident investigation:
 |
|
Sources:
S.A. CAA
Revision history:
| Date/time | Contributor | Updates |
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