Airworthiness directives › 2016-25-20
AD 2016-25-20 Airworthiness Directives; Airbus Helicopters
Applicability*9
This AD becomes effective January 31, 2017.
Compliance
Special flight permits are prohibited.
Required actions
(1) The Manager, Safety Management Group, FAA, may approve AMOCs for this AD. Send your proposal to: Robert Grant, Aviation Safety Engineer, Safety Management Group, 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.
Unsafe condition
(1) Within the initial inspection times shown in Table 1 to paragraph (e) of this AD or the next time maintenance of the helicopter involves removing the main gearbox, whichever comes first; and thereafter at intervals not to exceed the compliance times shown in Table 1 to paragraph (e) of this AD, inspect each cross-bar for a crack. For purposes of this AD, a torque cycle is defined as one landing with or without stopping the rotor or one external load-carrying operation; an external load-carrying operation occurs each time a helicopter picks up an external load and drops it off. Table 1 to Paragraph ( e ) Helicopter model Initial and recurrent inspection interval AS350B, AS350BA, AS350B1, AS350B2, AS350C, AS350D, and AS350D1 4,500 hours time-in-service (TIS) or 60,000 torque cycles, whichever occurs first. AS350B3, AS355E, AS355F, AS355F1, AS355F2, AS355N, and AS355 NP EC130B4 3,300 hours TIS or 60,000 torque cycles, whichever occurs first. EC130T2 3,300 hours TIS or 40,000 torque cycles, whichever occurs first. (2) If there is a crack, before further flight, replace the cross-bar.
Affected ADs
This AD defines the unsafe condition as a crack in a bi-directional cross-bar, which could result in failure of a cross-bar and loss of control of the helicopter.
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