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ASN Wikibase Occurrence # 72757
Last updated: 18 November 2021
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Date:16-FEB-2010
Time:06:40 UTC
Type:Silhouette image of generic R22 model; specific model in this crash may look slightly different
Robinson R22 Beta II
Owner/operator:National Airways Corporation
Registration: ZS-HAI
MSN: 4274
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Location:Rand Airport, Germiston, Gauteng -   South Africa
Phase: Landing
Nature:Training
Departure airport:Rand Airport, Germiston, Gauteng (FAGM)
Destination airport:Rand Airport, Germiston, Gauteng (FAGM)
Investigating agency: CAA SouthAfrica
Narrative:
A flight instructor accompanied by a student pilot took off from Rand Aerodrome (FAGM) on visual flight rules (VFR) training. The training included auto-rotation emergency sequences in all phases of flight. During the auto-rotation exercise at a height of approximately 500 feet above ground level (AGL) the main rotor rpm decayed.

The instructor advised the student to monitor the main rotor rpm and recover from the situation. The student pulled up the collective pitch lever, which caused the main rotor rpm to decay further. Although the instructor managed to lower the collective pitch lever, there was insufficient recovery time and height.

The flight instructor sustained minor injuries, the student sustained no injuries. The helicopter sustained substantial damage to the main rotor blades, tail boom and skid gear.

Probable Cause: During auto-rotation, the crew initiated the incorrect recovery technique by allowing the main rotor rpm to decay with insufficient time to recover from the low main rotor rpm.

Sources:

1. http://www.caa.co.za/Pages/Default.aspxAccidents%20and%20Incidents%20Reports/8757.pdf#search=ZS%2DHAI
2. http://www.surfacezero.com/g503/showphoto.php?photo=50222&title=robinson-r22-zs-hai-rand-airport-fagm&cat=576
3. https://abpic.co.uk/pictures/view/1199676/
4. http://www.rotorspot.nl/historic/zs.php
5. http://www.airport-data.com/aircraft/photo/000258268.html

Accident investigation:
cover
  
Investigating agency: CAA SouthAfrica
Status: Investigation completed
Duration:
Download report: Final report

Media:


Revision history:

Date/timeContributorUpdates
16-Feb-2010 04:22 RobertMB Added
16-Feb-2010 11:18 RobertMB Updated [Aircraft type, Registration, Cn, Operator, Source]
07-Mar-2010 11:22 dens69 Updated [Source]
04-Oct-2016 13:46 Dr.John Smith Updated [Time, Location, Departure airport, Destination airport, Source, Embed code, Narrative]
04-Oct-2016 13:47 Dr.John Smith Updated [Destination airport]

Corrections or additions? ... Edit this accident description