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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):
2012-22-14 Sikorsky Aircraft Corporation: Amendment 39-17251; Docket No. FAA-2012-1182; Directorate Identifier 2012-SW-062-AD.
(a) Applicability
This AD applies to Sikorsky Aircraft Corporation (Sikorsky) Model S-70, S-70A, S-70C, S-70C(M), and S-70C(M1) helicopters with an intermediate gearbox (IGB), part number 70357-06300-042, 70357- 06300-043, or 70357-06300-044, with 100 or less hours time-in- service since new or overhaul of the IGB on October 11, 2011, certificated in any category.
(b) Unsafe Condition
This AD defines the unsafe condition as blockage of the internal oil passages of the IGB by a protective plug, that could result in overheating and seizing of the IGB, failure of the tail rotor drive output shaft, loss of tail rotor drive, and subsequent loss of control of the helicopter.
(c) Other Affected ADs
This AD supersedes Emergency AD No. 2011-22-51, Directorate ID 2011-SW-056-AD, dated October 13, 2011.
(d) Effective Date
This AD becomes effective November 30, 2012.
(e) 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.
(f) Required Actions
Before further flight:
(1) Borescope inspect the IGB for any obstruction in the oil passages. Borescope inspect in accordance with the following portions of Sikorsky Alert Service Bulletin No. 70-06-29A, dated October 11, 2011 (ASB), except this AD does not require returning any parts to ``depot'' orSikorsky:
(i) The Accomplishment Instructions, Section 3., paragraphs A.(1) through A.(3)(a);
(ii) Equipment and Materials and Inspection sections of Appendix I; and
(iii) Figures 1 through 10 of Appendix I.
(2) As an alternative to the requirements of paragraph (f)(1) of this AD, disassemble the IGB and inspect the oil passages for any obstruction. Removing any obstruction from the IGB does not make it airworthy.
(3) If there is any obstruction in any oil passage, replace the IGB with an airworthy IGB before further flight.
(g) Special Flight Permits
Special flight permits are prohibited.
(h) Alternative Methods of Compliance (AMOCs)
(1) The Manager, Boston Aircraft Certification Office, FAA, may approve AMOCs for this AD. Send your proposal to: Mike Davison, Flight Test Engineer, Boston Aircraft Certification Office, FAA, 12 New England Executive Park, Burlington, MA 01803; telephone (781) 238-7156; fax (781) 238-7170; email michael.davison@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.
(i) Subject
Joint Aircraft Service Component (JASC) Code: 6520, Tail Rotor Gearbox.
(j) 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) Sikorsky Aircraft Corporation Alert Service Bulletin No. 70- 06-29A, dated October 11, 2011.
(ii) Reserved.
(3) For Sikorsky service information identified inthis AD, contact Sikorsky Aircraft Corporation, Attn: Manager, Commercial Technical Support, mailstop s581a, 6900 Main Street, Stratford, CT 06614; telephone (800) 562-4409; email tsslibrary@sikorsky.com; or at http://www.sikorsky.com.
(4) You may view this service information at the 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 also 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.
