🚁Proposed FAA Airworthiness Directive for Siam Hiller Helicopters
Airworthiness Directives; Siam Hiller Holdings, Inc, Helicopters
Summary
The FAA proposes to adopt a new airworthiness directive (AD) for Siam Hiller Holdings, Inc. (Siam Hiller), Model UH-12E (Army OH-23G and H-23F) and UH-12E-L helicopters. This proposed AD was prompted by reports of cracks found in a main rotor (M/R) transmission drive shaft (drive shaft). This proposed AD would require inspecting certain M/R drive shafts for a crack, prohibit installing certain M/R drive shafts unless the inspection is done, and prohibit using certain paint removers. The FAA is proposing this AD to address the unsafe condition on these products.
Agencies
- Transportation Department
- Federal Aviation Administration
Business Impact
$$ - Med
The proposed airworthiness directive (AD) requires compliance checks and potential replacement of helicopter components, which can incur significant costs for affected businesses. Compliance involves inspection and possible replacement of main rotor drive shafts, impacting operational readiness and financial planning. The estimated compliance cost is approximately $15,425 per helicopter, which is considerable for business budgets.