Airworthiness directives › 2020-06-11
AD 2020-06-11 Airworthiness Directives; MD Helicopters Inc. Helicopters
Applicability*9
This AD becomes effective April 28, 2020.
Compliance
Special flight permits are prohibited.
Required actions
(1) The Manager, Los Angeles ACO Branch, FAA, may approve AMOCs for this AD. Send your proposal to: Payman Soltani, Aerospace Engineer, Airframe Section, Los Angeles ACO Branch, Compliance and Airworthiness Division, FAA, 3960 Paramount Blvd., Lakewood, California 90712; telephone 562-627-5313; email 9-ANM-LAACO-AMOC-REQUESTS@faa.gov. (2) For operations conducted under a 14 CFR part 119 operating certificate or under 14 CFR part 91, subpart K, the FAA suggests that you notify your principal inspector, or lacking a principal inspector, the manager of the local flight standards district office or certificate holding district office before operating any aircraft complying with this AD through an AMOC.
Unsafe condition
Within 100 hours time-in-service (TIS): (1) Determine the total hours TIS of each link assembly P/N 600N7617-1. If the hours TIS are unknown, use the hours TIS of the helicopter. Remove from service any link assembly that has 15,000 or more hours TIS. Thereafter, remove from service any link assembly before accumulating 15,000 hours TIS. (2) Create a component history card or equivalent record for each link assembly P/N 600N7617-1 and record a life limit of 15,000 hours TIS. (3) As an optional terminating action to the requirements of paragraphs (e)(1) and (2) of this AD, you may remove from service link assembly P/N 600N7617-1 and install link assembly P/N 600N7617-5.
Affected ADs
This AD defines the unsafe condition as a link assembly remaining in service beyond its fatigue life. This condition could result in failure of the link assembly, failure of M/R blade pitch control, and subsequent loss of helicopter control.
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