Airworthiness directives › 2013-21-01
AD 2013-21-01 Airworthiness Directives; Eurocopter France (Eurocopter) Helicopters
Applicability*9
This AD becomes effective October 25, 2013.
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, 2601 Meacham Blvd., Fort Worth, Texas 76137; telephone (817) 222-5110; email robert.grant@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) For parts with 135 to 155 hours time-in-service (TIS), before exceeding 165 hours TIS, or for parts with more than 155 hours TIS, within 10 hours TIS, visually inspect each pitch horn for a crack in the areas shown in Figure 1 of Eurocopter Emergency Alert Service Bulletin (EASB) No. 05.00.74 or No. 05.00.65, both Revision 1 and both dated June 25, 2013, as appropriate for your model helicopter. (2) If there is a crack, before further flight, replace the pitch horn with an airworthy pitch horn. (3) Do not install a pitch horn, P/N 350A121368 (any dash number), on any helicopter unless it has passed a dye penetrant inspection for a crack in the areas shown in Figure 1 of EASB No. 05.00.74 or No. 05.00.65.
Affected ADs
This AD defines the unsafe condition as a crack in the yoke of a pitch horn. This condition could result in failure of a pitch horn, loss of the anti-torque function, and subsequent loss of control of the helicopter.
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