2013-22-01: Main Rotor Drive System

Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: PART 39--AIRWORTHINESS DIRECTIVES 0 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. Sec. 39.13 [Amended] 0 2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive (AD): 2013-22-01 Bell Helicopter Textron Canada: Amendment 39-17633; Docket No. FAA-2013-0526; Directorate Identifier 2008-SW-14-AD. (a) Applicability This AD applies to Model 206L-4 and 407 helicopters, with a freewheel aft bearing cap (cap), part number (P/N) 406-040-509-101, with a serial number with a prefix of ``A-'' and Nos. 1833 through 1912, installed, certificated in any category. (b) Unsafe Condition This AD defines the unsafe condition as certain caps being manufactured without a lubrication channel to allow oil flow into the aftbearing support assembly, which could result in failure of the freewheel unit and subsequent loss of control of the helicopter. (c) Effective Date This AD becomes effective December 5, 2013. (d) Compliance You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time. (e) Required Actions Within 50 hours time-in-service (TIS): (1) Remove and disassemble each freewheel assembly. (2) Replace the sprag and retainer (item 7), the output shaft (item 10), and the aft seal (item 3), as depicted in Figure 2 of Bell Alert Service Bulletin (ASB) No. 206L-04-129 for the Model 206L-4 and ASB No. 407-04-66 for the Model 407, both Revision A, and both dated December 1, 2004. (3) Visually inspect the remaining freewheel part details for a missing channel. (4) If the channel is missing, replace or rework the cap assembly by following the instructions depicted in Figure 3 of ASB 206L-04-129 or ASB 407 04-66, as applicable for your model helicopter. Using a vibrating stylus, mark the letter ``R'' at the end of the serial number on the cap assembly. (f) Alternative Methods of Compliance (AMOCs) (1) The Manager, Safety Management Group, FAA, may approve AMOCs for this AD. Send your proposal to: Eric Haight, Aviation Safety Engineer, FAA, Rotorcraft Directorate, Regulations and Policy Group, Fort Worth, Texas 76137, telephone (817) 222-5110, email: [email protected]. (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. (g) Additional Information The subject of this AD is addressed in Transport Canada Civil Aviation (TCCA) AD No. CF-2004-17R1, dated February 11, 2005. You may view the TCCA AD at http://www.regulations.gov in Docket No. FAA-2013-0526. (h) Subject Joint Aircraft Service Component (JASC) Code: 6300: Main Rotor Drive System. (i) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) Bell Alert Service Bulletin (ASB) No. 206L-04-129, Revision A, dated December 1, 2004. (ii) Bell ASB No. 407-04-66, Revision A, dated December 1, 2004. (3) For Bell service information identified in this AD, contact Bell Helicopter Textron, Inc., P.O. Box 482, Fort Worth, Texas 76101, telephone (817) 280-3391, fax (817) 280-6466. (4) You may view this service information at FAA, Office of the Regional Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas 76137. For information on the availability of this material at the FAA, call (817) 222-5110. (5) You may view this service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.