MD HELICOPTERS
Model 500N and 600N helicopters (Docket No. 99-SW-71-AD; Amendment 39-11564; AD 99-25-08) - publishes an amendment sent previously to all known U.S. owners and operators of Model 500N and 600N helicopters by individual letters. This AD requires, within the next five hours time-in-service (TIS) or...
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