Accident Robinson R44 Raven II ZT-RBD, 07 Aug 2019
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ASN Wikibase Occurrence # 275299
 
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Date:07-AUG-2019
Time:08:42 UTC
Type:Silhouette image of generic R44 model; specific model in this crash may look slightly different    
Robinson R44 Raven II
Owner/operator:Super Game Dealers CC
Registration: ZT-RBD
MSN: 13930
Fatalities:Fatalities: 0 / Occupants: 3
Other fatalities:0
Aircraft damage: Substantial
Category:Accident
Location:45 km east of the town Otjiwarongo -   Namibia
Phase: En route
Nature:SU
Departure airport:Wabi Game Lodge Private Airfield
Destination airport:Wabi Game Lodge Private Airfield
Investigating agency: DAAI Namibia
Confidence Rating: Accident investigation report completed and information captured
Narrative:
The helicopter was on a dry lease from an operator in South African to an operator in Namibia and was conducting a game counting operation on a game lodge on the Waterberg mountains when the accident happened.
From Wabi Lodge, the pilot was accompanied by two passengers who were assisting him in game counting operation. According to the pilot, the main rotor RPM started to decay, and the engine RPM started to increase during level flight. The pilot further stated that a stable orange low main rotor RPM warning light illuminated on the instrument panel and the audible warning alarm sounded. Straight and level flight was no longer possible as the rotor RPM have decayed to below 85%. A hard landing followed, and the helicopter bounced once followed by a slight yaw to the right. Nobody was injured in the accident. The helicopter tail rotor assembly including the tail rotor gearbox broke off and the lower section of the vertical stabilizer was compressed.

Probable Cause
Emergency landing due to the decaying of the main rotor RPM.

Sources:

DAAI

Accident investigation:
cover
  
Investigating agency: DAAI Namibia
Status: Investigation completed
Duration: 1 year and 2 months
Download report: Final report


Revision history:

Date/timeContributorUpdates
09-Feb-2022 08:49 harro Added

Corrections or additions? ... Edit this accident description

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