What specific failures led to the fatal Semenyih helicopter crash?

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Pilot Negligence and Mechanical Failure Contributed to Fatal Semenyih Helicopter Crash

The fatal crash of the Dauphin helicopter in Semenyih, which claimed the lives of Rompin MP Tan Sri Jamaluddin Jarjis and five others, was primarily attributed to the pilot's failure to conduct a thorough post-landing inspection and a subsequent mechanical failure of the aircraft's left horizontal stabiliser. The incident occurred on April 4, when the helicopter, en route from Pekan to Muadzam Shah, experienced an unplanned landing in a football field in Muadzam Shah, Pahang, due to a passenger's request to disembark.
Pilot's Inadequate Inspection Post-Rough Landing

Following the rough landing in Muadzam Shah, pilot Captain Clifford Fournier did not perform a detailed assessment of the Dauphin helicopter. The aircraft's left landing gear had sunk approximately 51cm into soft ground, causing a significant tilt of over 13 degrees to the left. Despite an excessive oil leak and visible damage to other components, including the left horizontal stabiliser vertical fin and the tail section impacting the ground, Fournier proceeded with the flight to Subang Airport without addressing these issues. Eyewitness accounts indicated that Fournier only escorted a disembarking passenger clear of the main rotor area and did not conduct any further inspection of the helicopter.
Mechanical Failure of the Left Horizontal Stabiliser

The official investigation identified the separation of the left horizontal stabiliser as the direct cause of the accident. This critical component suffered damage during the unplanned rough landing in Muadzam Shah when it impacted the ground. The continued flight under these compromised conditions, coupled with excessive loads on the fractured stabiliser due to a high cruising speed during descent, ultimately led to its failure in mid-air.
Contributing Factors Including Unplanned Diversion and Passenger Influence

Beyond the pilot's oversight and the mechanical failure, several other factors contributed to the fatal outcome. The initial flight path was altered due to bad weather, prompting a suggestion for a diversion to Subang Airport. The necessity of the unplanned landing in the football field to allow a passenger to disembark further complicated the situation. The report also suggested that potential passenger pressure on the pilot to expedite the journey home may have influenced his decision-making process, possibly leading him to overlook critical pre-flight checks or rush the subsequent stages of the flight.
Maintenance and Pilot Licensing Were Found to Be in Order

Despite the circumstances leading to the crash, the investigation did confirm that pilot Captain Clifford Fournier was appropriately licensed to operate the helicopter. Furthermore, the helicopter's maintenance contracts, specifically with Airbus Helicopter, were found to have been carried out correctly according to the established maintenance programme. These findings indicate that the accident was not a result of systemic issues with pilot qualifications or routine aircraft upkeep, but rather a confluence of specific procedural failures and mechanical stress.

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What specific failures led to the fatal Semenyih helicopter crash?

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