ASN Wikibase Occurrence # 70174
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| Date: | Thursday 26 November 2009 |
| Time: | 08:03 UTC |
| Type: |  Robinson R22 Beta II |
| Owner/operator: | Racecraft Motors (Pty) Ltd |
| Registration: | ZS-SRV |
| MSN: | 3300 |
| Year of manufacture: | 2002 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Location: | West of Runway 35 at Rand Airport, Germiston, Gauteng -
 South Africa
|
| Phase: | Approach |
| Nature: | Training |
| Departure airport: | Rand Airport, Germiston, Gauteng (FAGM) |
| Rand Airport, Germiston, Gauteng (FAGM) | |
| Investigating agency: | CAA S.A. |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
The flight instructor and a student were engaged on a training flight when the accident occurred. After the takeoff, the instructor flew to the training area where the student took control of the helicopter. The student started flying a circuit and was supposed to re-position the helicopter for the exercise. The flight instructor noticed that the helicopter was loosing height and instructed the student not to descend.
The student raised the collective to rectify the loss of height. After the student raised the collective, the low rotor revolutions per minute (RPM) warning light illuminated. The flight instructor took control and lowered the collective while rolling the throttle to restore RPM, but was not successful. The flight instructor turned the helicopter to the right in an attempt to avoid colliding with a fence that was in front of the helicopter. Due to insufficient height, the helicopter’s left-hand skid dug into the ground and the helicopter rolled over onto its left side
The helicopter lost height due to the tailwind that was uncompensated for by the student and the raising of the collective while the engine was not producing adequate power, which led to the low RPM light illuminating. It is most likely that when the flight instructor took control of the helicopter, the angle of attack was increased, which resulted in more drag and which further slowed the rotor speed. Excessive main rotor RPM decay occurred rapidly and recovery at low altitude was virtually impossible.
Both the instructor and the student sustained minor injuries. The helicopter was substantially damaged.
Accident investigation:
 |
|
Sources:
1. http://www.caa.co.za/Pages/Default.aspxAccidents%20and%20Incidents%20Reports/8711.pdf
2. http://helihub.com/2009/11/26/26-nov-09-zs-srv-robinson-r22-rand-south-africa/
3. https://abpic.co.uk/pictures/view/1199457
History of this aircraft
Other occurrences involving this aircraft
| 15 November 2017 | ZS-SRV | Private | 2 | Bigstok Farm, Clocolan, Free State | |
w/o |
| Collision with pole or wires | ||||||
Media:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 26-Nov-2009 13:03 | Topaz | Added |
| 03-Oct-2016 21:55 | Dr.John Smith | Updated [Time, Location, Departure airport, Destination airport, Source, Narrative] |
| 24-Sep-2018 01:29 | Dr.John Smith | Updated [Source, Embed code, Narrative] |
| 24-Sep-2018 01:30 | Dr.John Smith | Updated [Narrative] |
Corrections or additions? ... Edit this accident description
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