Airworthiness directives › 2013-25-09
AD 2013-25-09 Airworthiness Directives; AgustaWestland S.p.A. (Type Certificate Previously Held by Agusta S.p.A.) Helicopters
Applicability*9
This AD becomes effective January 28, 2014.
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 817-222-5328; 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
Within 50 hours time-in-service: (1) Inspect the NLG pin installations on the left and right arms to determine whether the bolt (item 2), washer (item 3) under the bolt head, washer (item 4) between the NLG arm and pin, pin (item 5), washer (item 6) under the nut, nut (item 7), and cotter pin (item 8) are installed as depicted in Figure 1 of Agusta Bollettino Tecnico (BT) No. 139-306, dated December 12, 2012 (BT 139-306). (2) If any part is not installed as depicted in Figure 1 of BT 139-306, before further flight, disassemble items 2 through 8 and accomplish the following: (i) Inspect each bolt and nut for corrosion. If there is any corrosion on a bolt or nut, remove the bolt and nut from service. (ii) Inspect each pin for corrosion and damage. If there is any corrosion or damage: (A) Remove the corrosion and damage with an abrasive stone or glass fiber brush. (B) Measure the pin diameter. If the pin diameter is less than 25.36 mm (0.998 inch), remove the pin from service. (iii) Inspect each pin for a crack. If there is a crack, remove the pin from service. (iv) Dye penetrant inspect the pin flange for a crack. If there is a crack, remove the pin from service. (3) If items 2 through 8 are installed as depicted in Figure 1 of BT 139-306, inspect each bolt head and nut for corrosion. If there is any corrosion on a bolt head or nut, before further flight, remove the bolt or nut from service.
Affected ADs
This AD defines the unsafe condition as an incorrect installation of an NLG pin, which could result in collapse of the NLG during taxi or landing.
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