Parker Hannifin controversies

Unconfirmed ransomware attack claim involving Parker Hannifin

Issue disclosure

A ransomware group claimed responsibility for an attack on Parker Hannifin and described approximately 10.9 terabytes of data. The report says the claim is unverified and Parker Hannifin has not publicly confirmed the breach.

F-35B fueldraulic-line manufacturing defect

A failure in the propulsion-system fueldraulic line of an F-35B aircraft led to a temporary grounding of the variant. The defect was attributed to manufacturing in Parker Hannifin's Stratoflex division.

SilkAir Flight 185 civil litigation

A Los Angeles jury ordered Parker Hannifin to pay $43 million to families connected with the SilkAir Flight 185 crash. Parker appealed, and the matter was later resolved through an undisclosed out-of-court settlement. Investigators differed over the crash's cause, and the Indonesian investigation did not reach a definitive conclusion.

Boeing 737 rudder-control controversy

Failures involving a servo unit supplied for Boeing 737 aircraft were investigated in connection with several accidents and incidents, including United Airlines Flight 585 and USAir Flight 427. The FAA later required upgrades to 737 rudder-control systems. Parker maintained that its component was not responsible, while subsequent commentary continued to debate the technical findings.