Aviation safety investigations & reports

Bell 206B, VH-UTS, Nunawading VIC, 22 April 1984

Investigation number:
198402331
Status: Completed
Investigation completed

Summary

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During the take-off, the engine instruments were checked while the helicopter was in a hover and no abnormalities were noted. Just as forward movement was commenced a loud noise was heard and all engine power was lost. A significant drop in rotor rpm occurred and the main rotor struck the tail boom during the subsequent forced landing. Inspection revealed a total mechanical failure of the engine compressor. The majority of compressor blades were found to be broken and the resulting degree of damage precluded identification of the location of the initial failure. However, the examination of sections of blades revealed corrosion pitting consistent with inadequate compressor washing servicing. The aircraft had been operating in a corrosive atmospheric environment and it is probable that the initial failure within the compressor resulted from corrosion induced fatigue.

Download Final Report
[Download  PDF: 22KB]
 
 
 
General details
Date: 22 April 1984   Investigation status: Completed  
Time: N/A    
Location: Nunawading    
State: Victoria    
Release date: 18 September 1985   Occurrence category: Accident  
Report status: Final   Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer Bell Helicopter Co  
Aircraft model 206  
Aircraft registration VH-UTS  
Type of operation Business  
Sector Helicopter  
Damage to aircraft Substantial  
Departure point Nunawading VIC  
Departure time N/A  
Destination Heyfield VIC  
Last update 01 April 2011