Airworthiness directives › 2016-01-19
AD 2016-01-19 Airworthiness Directives; MD Helicopters Inc.
Applicability*9
This AD becomes effective February 25, 2016.
Compliance
(1) The Manager, Los Angeles Aircraft Certification Office, FAA, may approve AMOCs for this AD. Send your proposal to: Galib Abumeri, Aerospace Engineer, Los Angeles Aircraft Certification Office, Transport Airplane Directorate, FAA, 3960 Paramount Blvd., Lakewood, California 90712, telephone 562-627-5324; 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, we suggest 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.
Required actions
MD Helicopters Inc. Service Bulletin SB500N-046/SB600N-054, dated July 9, 2012, which is not incorporated by reference, contains additional information about the subject of this AD. For service information identified in this AD, contact MD Helicopters, Inc., Attn: Customer Support Division, 4555 E. McDowell Rd., Mail Stop M615, Mesa, AZ 85215-9734; telephone 1-800-388-3378; fax 480-346-6813; or at http://www.mdhelicopters.com . You may review a copy of this service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy, Room 6N-321, Fort Worth, TX 76177.
Unsafe condition
(1) Within 1 year or at the next annual inspection, whichever comes later: (i) Create a component history card or equivalent record for each rotating cone assembly, P/N 500N3740-81 and P/N 500N3740-71, and record a life limit of 10,000 hours time-in-service (TIS). (ii) Revise the Airworthiness Limitations Section of the applicable maintenance manual or Instructions for Continued Airworthiness by establishing a new retirement life of 10,000 hours TIS for each rotating cone assembly, P/N 500N3740-81 and P/N 500N3740-71, by making pen-and-ink changes or by inserting a copy of this AD into the Airworthiness Limitations Section of the maintenance manual or the Instructions for Continued Airworthiness. (iii) Remove from service any rotating cone assembly, P/N 500N3740-81 and P/N 500N3740-71, that has 10,000 or more hours TIS. (2) Do not install a rotating cone assembly, P/N 500N3740-81 or P/N 500N3740-71, on any helicopter unless you have complied with the requirements of this AD.
Affected ADs
This AD defines the unsafe condition as a rotating cone assembly remaining in service beyond its fatigue life. This condition could result in failure of the rotating cone assembly and loss of control of the helicopter.
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