Airworthiness directives › 2018-03-01
AD 2018-03-01 Airworthiness Directives; Agusta S.p.A. Helicopters
Applicability*9
This AD becomes effective February 14, 2018.
Compliance
(1) The Manager, Safety Management Section, Rotorcraft Standards Branch, FAA, may approve AMOCs for this AD. Send your proposal to: Matt Fuller, Senior Aviation Safety Engineer, Safety Management Section, Rotorcraft Standards Branch, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone (817) 222-5110; email 9-ASW-FTW-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
The subject of this AD is addressed in European Aviation Safety Agency (EASA) AD No. 2017-0175-E, dated September 13, 2017. You may view the EASA AD on the internet at http://www.regulations.gov by searching for and locating it in Docket No. FAA-2017-0939.
Unsafe condition
(1) Within 5 hours time-in-service (TIS), using a tap hammer or equivalent, tap inspect each MRB tip cap for disbonding in the area depicted in Figure 1 of Leonardo Helicopters Emergency Alert Service Bulletin No. 139-508, dated September 12, 2017 (EASB). (i) If there is any disbonding, before further flight, remove the MRB from service. (ii) If there is no disbonding, within 10 hours TIS, remove the MRB from service. (2) After the effective date of this AD, do not install a MRB P/N 3G6210A00131 with a S/N 3615, 3634, 3667, or 3729 on any helicopter.
Affected ADs
This AD defines the unsafe condition as disbonding of an MRB tip cap. This condition could result in loss of the MRB tip cap, severe vibrations, and subsequent loss of control of the helicopter.
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