dasher1973
30th Jun 2010, 06:30
Couple of good ATSB reports out recently;
AO-2008-039 - Airframe vibration, Wollongong Aerodrome, NSW, 11 June 2008, VH-VAH, Bell Helicopter Co. 412 (http://www.atsb.gov.au/publications/investigation_reports/2008/aair/ao-2008-039.aspx)
The Bell 412 helicopter was being used to conduct training operations from Wollongong Aerodrome, NSW. Shortly after landing on the runway, the helicopter developed severe vertical airframe vibrations that resulted in reduced pilot control. In an attempt to mitigate the vibrations, the pilot raised the helicopter into the hover, however, the vibrations continued to increase in severity. In response, the pilot lowered the collective to set the helicopter back down onto the runway. The resulting heavy landing caused serious damage to the helicopter, the crew were not injured.
Total power loss, VH-NSH, Bell Helicopter 407, Talbot Bay, WA on 25 September 2008
AO-2008-067 (http://www.atsb.gov.au/publications/investigation_reports/2008/aair/ao-2008-067.aspx)
ATSB report into the Total power loss, VH-NSH, Bell Helicopter 407, Talbot Bay, WA on 25 September 2008.
As the pilot moved the helicopter clear of the ship, and at a height of about 10 m above the surface of the sea, a loud bang was heard followed by a total power loss. The helicopter rapidly descended to the water, where it rolled onto its side before inverting.
Dash
AO-2008-039 - Airframe vibration, Wollongong Aerodrome, NSW, 11 June 2008, VH-VAH, Bell Helicopter Co. 412 (http://www.atsb.gov.au/publications/investigation_reports/2008/aair/ao-2008-039.aspx)
The Bell 412 helicopter was being used to conduct training operations from Wollongong Aerodrome, NSW. Shortly after landing on the runway, the helicopter developed severe vertical airframe vibrations that resulted in reduced pilot control. In an attempt to mitigate the vibrations, the pilot raised the helicopter into the hover, however, the vibrations continued to increase in severity. In response, the pilot lowered the collective to set the helicopter back down onto the runway. The resulting heavy landing caused serious damage to the helicopter, the crew were not injured.
Total power loss, VH-NSH, Bell Helicopter 407, Talbot Bay, WA on 25 September 2008
AO-2008-067 (http://www.atsb.gov.au/publications/investigation_reports/2008/aair/ao-2008-067.aspx)
ATSB report into the Total power loss, VH-NSH, Bell Helicopter 407, Talbot Bay, WA on 25 September 2008.
As the pilot moved the helicopter clear of the ship, and at a height of about 10 m above the surface of the sea, a loud bang was heard followed by a total power loss. The helicopter rapidly descended to the water, where it rolled onto its side before inverting.
Dash